NAME
    Calendar::Indonesia::Holiday - List Indonesian public holidays

VERSION
    This document describes version 0.351 of Calendar::Indonesia::Holiday
    (from Perl distribution Calendar-Indonesia-Holiday), released on
    2023-07-11.

SYNOPSIS
     use Calendar::Indonesia::Holiday qw(
         list_idn_holidays
         list_idn_workdays

         count_idn_workdays

         is_idn_holiday
         is_idn_workday
     );

    This lists Indonesian holidays for the year 2011, without the joint
    leave days ("cuti bersama"), showing only the dates:

     my $res = list_idn_holidays(year => 2011, is_joint_leave=>0);

    Sample result:

     [200, "OK", [
       '2011-01-01',
       '2011-02-03',
       '2011-02-16',
       '2011-03-05',
       '2011-04-22',
       '2011-05-17',
       '2011-06-02',
       '2011-06-29',
       '2011-08-17',
       '2011-08-31',
       '2011-09-01',
       '2011-11-07',
       '2011-11-27',
       '2011-12-25',
     ]];

    This lists religious Indonesian holidays, showing full details:

     my $res = list_idn_holidays(year => 2011,
                                 "tags.has" => ['religious'], detail=>1);

    Sample result:

     [200, "OK", [
       {date        => '2011-02-16',
        day         => 16,
        month       => 2,
        year        => 2011,
        ind_name    => 'Maulid Nabi Muhammad',
        eng_name    => 'Mawlid',
        eng_aliases => ['Mawlid An-Nabi'],
        ind_aliases => ['Maulud'],
        is_holiday  => 1,
        tags        => [qw/religious religion=islam calendar=lunar/],
       },
       ...
     ]];

    This checks whether 2011-02-16 is a holiday:

     my $res = is_idn_holiday(date => '2011-02-16');
     print "2011-02-16 is a holiday\n" if $res->[2];

    This checks whether 2021-03-11 is a working day:

     my $res = is_idn_workday(date => '2021-03-11');
     print "2011-02-16 is a holiday\n" if $res->[2];

    This lists working days for a certain period:

     my $res = list_idn_workdays(start_date=>'2021-01-01', end_date=>'2021-06-30');

    Idem, but returns a number instead. If unspecified, "start_date"
    defaults to start of current month and "end_date" defaults to end of
    current month. So this returns the number of working days in the current
    month:

     my $res = count_idn_workdays();

DESCRIPTION
    This module provides functions to list Indonesian holidays. There is a
    command-line script interface for this module: list-idn-holidays and a
    few others distributed in App::IndonesianHolidayUtils distribution.

    Calendar years supported: 1990-2023.

    Note: Note that sometimes the holiday (as set by law) falls at a
    different date than the actual religious commemoration date. When you
    use the "detail" option, the "original_date" key will show you the
    actual religious date.

    Note: it is also possible that multiple (religious, cultural) holidays
    fall on the same national holiday. An example is May 8, 1997 which is
    commemorated as Hijra 1418H as well as Ascension Day. When this happens,
    the "holidays" key will contain the details of each religious/cultural
    holiday.

    Caveat: aside from national holidays, some provinces sometimes declare
    their own (e.g. governor election day for East Java province, etc). This
    is currently not yet included in this module.

DEVELOPER NOTES
    To mark that a holiday has been moved from its original date, use the
    "original_date" option. For example, Mawlid in 2021 has been moved from
    its original date 2021-11-19 (this is the day it is actually
    observed/commemorated) to 2021-11-20 (this is the day the holiday is in
    effect where offices and public places are closed). By adding this
    option, the summary will reflect this information:

     date: 2021-12-20
     eng_name: Mawlid (commemorated on 2021-12-19)
     ind_name: Maulid Nabi Muhammad (diperingati 2021-12-19)

FUNCTIONS
  count_idn_workdays
    Usage:

     count_idn_workdays(%args) -> [$status_code, $reason, $payload, \%result_meta]

    Count working days (non-holiday business days) for a certain period.

    Working day is defined as day that is not Saturday*/Sunday/holiday/joint
    leave days*. If work_saturdays is set to true, Saturdays are also
    counted as working days. If observe_joint_leaves is set to false, joint
    leave days are also counted as working days.

    Contains data from years 1990 to 2023

    This function is not exported by default, but exportable.

    Arguments ('*' denotes required arguments):

    *   end_date => *str*

        End date.

        Defaults to end of current month. Either a string in the form of
        "YYYY-MM-DD", or a DateTime object, is accepted.

    *   observe_joint_leaves => *bool* (default: 1)

        If set to 0, do not observe joint leave as holidays.

    *   start_date => *str*

        Starting date.

        Defaults to start of current month. Either a string in the form of
        "YYYY-MM-DD", or a DateTime object, is accepted.

    *   work_saturdays => *bool* (default: 0)

        If set to 1, Saturday is a working day.

    Returns an enveloped result (an array).

    First element ($status_code) is an integer containing HTTP-like status
    code (200 means OK, 4xx caller error, 5xx function error). Second
    element ($reason) is a string containing error message, or something
    like "OK" if status is 200. Third element ($payload) is the actual
    result, but usually not present when enveloped result is an error
    response ($status_code is not 2xx). Fourth element (%result_meta) is
    called result metadata and is optional, a hash that contains extra
    information, much like how HTTP response headers provide additional
    metadata.

    Return value: (any)

  is_idn_holiday
    Usage:

     is_idn_holiday(%args) -> [$status_code, $reason, $payload, \%result_meta]

    Check whether a date is an Indonesian holiday.

    Will return boolean if a given date is a holiday. A joint leave day will
    not count as holiday unless you specify "include_joint_leave" option.

    Date can be given using separate "day" (of month), "month", and "year",
    or as a single YYYY-MM-DD date.

    Will return undef (exit code 2 on CLI) if year is not within range of
    the holiday data.

    Note that you can also use "list_idn_holidays" to check whether a "date"
    (or a combination of "day", "month", and "year") is a holiday , but
    "is_idn_holiday" is slightly more efficient, its "include_joint_leave"
    option is more convenient, and it offers a few more options.

    This function is not exported by default, but exportable.

    Arguments ('*' denotes required arguments):

    *   date => *str*

        (No description)

    *   day => *int*

        (No description)

    *   detail => *bool*

        (No description)

    *   include_joint_leave => *bool*

        (No description)

    *   month => *int*

        (No description)

    *   quiet => *bool*

        (No description)

    *   reverse => *bool*

        (No description)

    *   year => *int*

        (No description)

    Returns an enveloped result (an array).

    First element ($status_code) is an integer containing HTTP-like status
    code (200 means OK, 4xx caller error, 5xx function error). Second
    element ($reason) is a string containing error message, or something
    like "OK" if status is 200. Third element ($payload) is the actual
    result, but usually not present when enveloped result is an error
    response ($status_code is not 2xx). Fourth element (%result_meta) is
    called result metadata and is optional, a hash that contains extra
    information, much like how HTTP response headers provide additional
    metadata.

    Return value: (any)

  is_idn_workday
    Usage:

     is_idn_workday(%args) -> [$status_code, $reason, $payload, \%result_meta]

    Check whether a date is a working day (non-holiday business day).

    Working day is defined as day that is not Saturday*/Sunday/holiday/joint
    leave days*. If work_saturdays is set to true, Saturdays are also
    counted as working days. If observe_joint_leaves is set to false, joint
    leave days are also counted as working days.

    Contains data from years 1990 to 2023

    This function is not exported by default, but exportable.

    Arguments ('*' denotes required arguments):

    *   date => *str*

        (No description)

    *   day => *int*

        (No description)

    *   month => *int*

        (No description)

    *   observe_joint_leaves => *bool* (default: 1)

        If set to 0, do not observe joint leave as holidays.

    *   work_saturdays => *bool* (default: 0)

        If set to 1, Saturday is a working day.

    *   year => *int*

        (No description)

    Returns an enveloped result (an array).

    First element ($status_code) is an integer containing HTTP-like status
    code (200 means OK, 4xx caller error, 5xx function error). Second
    element ($reason) is a string containing error message, or something
    like "OK" if status is 200. Third element ($payload) is the actual
    result, but usually not present when enveloped result is an error
    response ($status_code is not 2xx). Fourth element (%result_meta) is
    called result metadata and is optional, a hash that contains extra
    information, much like how HTTP response headers provide additional
    metadata.

    Return value: (any)

  list_idn_holidays
    Usage:

     list_idn_holidays(%args) -> [$status_code, $reason, $payload, \%result_meta]

    List Indonesian holidays in calendar.

    List holidays and joint leave days ("cuti bersama").

    Contains data from years 1990 to 2023

    This function is not exported by default, but exportable.

    Arguments ('*' denotes required arguments):

    *   date => *date*

        Only return records where the 'date' field equals specified value.

    *   date.in => *array[date]*

        Only return records where the 'date' field is in the specified
        values.

    *   date.is => *date*

        Only return records where the 'date' field equals specified value.

    *   date.isnt => *date*

        Only return records where the 'date' field does not equal specified
        value.

    *   date.max => *date*

        Only return records where the 'date' field is less than or equal to
        specified value.

    *   date.min => *date*

        Only return records where the 'date' field is greater than or equal
        to specified value.

    *   date.not_in => *array[date]*

        Only return records where the 'date' field is not in the specified
        values.

    *   date.xmax => *date*

        Only return records where the 'date' field is less than specified
        value.

    *   date.xmin => *date*

        Only return records where the 'date' field is greater than specified
        value.

    *   day => *int*

        Only return records where the 'day' field equals specified value.

    *   day.in => *array[int]*

        Only return records where the 'day' field is in the specified
        values.

    *   day.is => *int*

        Only return records where the 'day' field equals specified value.

    *   day.isnt => *int*

        Only return records where the 'day' field does not equal specified
        value.

    *   day.max => *int*

        Only return records where the 'day' field is less than or equal to
        specified value.

    *   day.min => *int*

        Only return records where the 'day' field is greater than or equal
        to specified value.

    *   day.not_in => *array[int]*

        Only return records where the 'day' field is not in the specified
        values.

    *   day.xmax => *int*

        Only return records where the 'day' field is less than specified
        value.

    *   day.xmin => *int*

        Only return records where the 'day' field is greater than specified
        value.

    *   decree_date => *str*

        Only return records where the 'decree_date' field equals specified
        value.

    *   decree_date.contains => *str*

        Only return records where the 'decree_date' field contains specified
        text.

    *   decree_date.in => *array[str]*

        Only return records where the 'decree_date' field is in the
        specified values.

    *   decree_date.is => *str*

        Only return records where the 'decree_date' field equals specified
        value.

    *   decree_date.isnt => *str*

        Only return records where the 'decree_date' field does not equal
        specified value.

    *   decree_date.max => *str*

        Only return records where the 'decree_date' field is less than or
        equal to specified value.

    *   decree_date.min => *str*

        Only return records where the 'decree_date' field is greater than or
        equal to specified value.

    *   decree_date.not_contains => *str*

        Only return records where the 'decree_date' field does not contain
        specified text.

    *   decree_date.not_in => *array[str]*

        Only return records where the 'decree_date' field is not in the
        specified values.

    *   decree_date.xmax => *str*

        Only return records where the 'decree_date' field is less than
        specified value.

    *   decree_date.xmin => *str*

        Only return records where the 'decree_date' field is greater than
        specified value.

    *   decree_note => *str*

        Only return records where the 'decree_note' field equals specified
        value.

    *   decree_note.contains => *str*

        Only return records where the 'decree_note' field contains specified
        text.

    *   decree_note.in => *array[str]*

        Only return records where the 'decree_note' field is in the
        specified values.

    *   decree_note.is => *str*

        Only return records where the 'decree_note' field equals specified
        value.

    *   decree_note.isnt => *str*

        Only return records where the 'decree_note' field does not equal
        specified value.

    *   decree_note.max => *str*

        Only return records where the 'decree_note' field is less than or
        equal to specified value.

    *   decree_note.min => *str*

        Only return records where the 'decree_note' field is greater than or
        equal to specified value.

    *   decree_note.not_contains => *str*

        Only return records where the 'decree_note' field does not contain
        specified text.

    *   decree_note.not_in => *array[str]*

        Only return records where the 'decree_note' field is not in the
        specified values.

    *   decree_note.xmax => *str*

        Only return records where the 'decree_note' field is less than
        specified value.

    *   decree_note.xmin => *str*

        Only return records where the 'decree_note' field is greater than
        specified value.

    *   detail => *bool* (default: 0)

        Return array of full records instead of just ID fields.

        By default, only the key (ID) field is returned per result entry.

    *   dow => *int*

        Only return records where the 'dow' field equals specified value.

    *   dow.in => *array[int]*

        Only return records where the 'dow' field is in the specified
        values.

    *   dow.is => *int*

        Only return records where the 'dow' field equals specified value.

    *   dow.isnt => *int*

        Only return records where the 'dow' field does not equal specified
        value.

    *   dow.max => *int*

        Only return records where the 'dow' field is less than or equal to
        specified value.

    *   dow.min => *int*

        Only return records where the 'dow' field is greater than or equal
        to specified value.

    *   dow.not_in => *array[int]*

        Only return records where the 'dow' field is not in the specified
        values.

    *   dow.xmax => *int*

        Only return records where the 'dow' field is less than specified
        value.

    *   dow.xmin => *int*

        Only return records where the 'dow' field is greater than specified
        value.

    *   eng_aliases => *array*

        Only return records where the 'eng_aliases' field equals specified
        value.

    *   eng_aliases.has => *array[str]*

        Only return records where the 'eng_aliases' field is an array/list
        which contains specified value.

    *   eng_aliases.is => *array*

        Only return records where the 'eng_aliases' field equals specified
        value.

    *   eng_aliases.isnt => *array*

        Only return records where the 'eng_aliases' field does not equal
        specified value.

    *   eng_aliases.lacks => *array[str]*

        Only return records where the 'eng_aliases' field is an array/list
        which does not contain specified value.

    *   eng_name => *str*

        Only return records where the 'eng_name' field equals specified
        value.

    *   eng_name.contains => *str*

        Only return records where the 'eng_name' field contains specified
        text.

    *   eng_name.in => *array[str]*

        Only return records where the 'eng_name' field is in the specified
        values.

    *   eng_name.is => *str*

        Only return records where the 'eng_name' field equals specified
        value.

    *   eng_name.isnt => *str*

        Only return records where the 'eng_name' field does not equal
        specified value.

    *   eng_name.max => *str*

        Only return records where the 'eng_name' field is less than or equal
        to specified value.

    *   eng_name.min => *str*

        Only return records where the 'eng_name' field is greater than or
        equal to specified value.

    *   eng_name.not_contains => *str*

        Only return records where the 'eng_name' field does not contain
        specified text.

    *   eng_name.not_in => *array[str]*

        Only return records where the 'eng_name' field is not in the
        specified values.

    *   eng_name.xmax => *str*

        Only return records where the 'eng_name' field is less than
        specified value.

    *   eng_name.xmin => *str*

        Only return records where the 'eng_name' field is greater than
        specified value.

    *   exclude_fields => *array[str]*

        Select fields to return.

    *   fields => *array[str]*

        Select fields to return.

    *   ind_aliases => *array*

        Only return records where the 'ind_aliases' field equals specified
        value.

    *   ind_aliases.has => *array[str]*

        Only return records where the 'ind_aliases' field is an array/list
        which contains specified value.

    *   ind_aliases.is => *array*

        Only return records where the 'ind_aliases' field equals specified
        value.

    *   ind_aliases.isnt => *array*

        Only return records where the 'ind_aliases' field does not equal
        specified value.

    *   ind_aliases.lacks => *array[str]*

        Only return records where the 'ind_aliases' field is an array/list
        which does not contain specified value.

    *   ind_name => *str*

        Only return records where the 'ind_name' field equals specified
        value.

    *   ind_name.contains => *str*

        Only return records where the 'ind_name' field contains specified
        text.

    *   ind_name.in => *array[str]*

        Only return records where the 'ind_name' field is in the specified
        values.

    *   ind_name.is => *str*

        Only return records where the 'ind_name' field equals specified
        value.

    *   ind_name.isnt => *str*

        Only return records where the 'ind_name' field does not equal
        specified value.

    *   ind_name.max => *str*

        Only return records where the 'ind_name' field is less than or equal
        to specified value.

    *   ind_name.min => *str*

        Only return records where the 'ind_name' field is greater than or
        equal to specified value.

    *   ind_name.not_contains => *str*

        Only return records where the 'ind_name' field does not contain
        specified text.

    *   ind_name.not_in => *array[str]*

        Only return records where the 'ind_name' field is not in the
        specified values.

    *   ind_name.xmax => *str*

        Only return records where the 'ind_name' field is less than
        specified value.

    *   ind_name.xmin => *str*

        Only return records where the 'ind_name' field is greater than
        specified value.

    *   is_holiday => *bool*

        Only return records where the 'is_holiday' field equals specified
        value.

    *   is_holiday.is => *bool*

        Only return records where the 'is_holiday' field equals specified
        value.

    *   is_holiday.isnt => *bool*

        Only return records where the 'is_holiday' field does not equal
        specified value.

    *   is_joint_leave => *bool*

        Only return records where the 'is_joint_leave' field equals
        specified value.

    *   is_joint_leave.is => *bool*

        Only return records where the 'is_joint_leave' field equals
        specified value.

    *   is_joint_leave.isnt => *bool*

        Only return records where the 'is_joint_leave' field does not equal
        specified value.

    *   month => *int*

        Only return records where the 'month' field equals specified value.

    *   month.in => *array[int]*

        Only return records where the 'month' field is in the specified
        values.

    *   month.is => *int*

        Only return records where the 'month' field equals specified value.

    *   month.isnt => *int*

        Only return records where the 'month' field does not equal specified
        value.

    *   month.max => *int*

        Only return records where the 'month' field is less than or equal to
        specified value.

    *   month.min => *int*

        Only return records where the 'month' field is greater than or equal
        to specified value.

    *   month.not_in => *array[int]*

        Only return records where the 'month' field is not in the specified
        values.

    *   month.xmax => *int*

        Only return records where the 'month' field is less than specified
        value.

    *   month.xmin => *int*

        Only return records where the 'month' field is greater than
        specified value.

    *   note => *str*

        Only return records where the 'note' field equals specified value.

    *   note.contains => *str*

        Only return records where the 'note' field contains specified text.

    *   note.in => *array[str]*

        Only return records where the 'note' field is in the specified
        values.

    *   note.is => *str*

        Only return records where the 'note' field equals specified value.

    *   note.isnt => *str*

        Only return records where the 'note' field does not equal specified
        value.

    *   note.max => *str*

        Only return records where the 'note' field is less than or equal to
        specified value.

    *   note.min => *str*

        Only return records where the 'note' field is greater than or equal
        to specified value.

    *   note.not_contains => *str*

        Only return records where the 'note' field does not contain
        specified text.

    *   note.not_in => *array[str]*

        Only return records where the 'note' field is not in the specified
        values.

    *   note.xmax => *str*

        Only return records where the 'note' field is less than specified
        value.

    *   note.xmin => *str*

        Only return records where the 'note' field is greater than specified
        value.

    *   queries => *array[str]*

        Search.

        This will search all searchable fields with one or more specified
        queries. Each query can be in the form of "-FOO" (dash prefix
        notation) to require that the fields do not contain specified
        string, or "/FOO/" to use regular expression. All queries must match
        if the "query_boolean" option is set to "and"; only one query should
        match if the "query_boolean" option is set to "or".

    *   query_boolean => *str* (default: "and")

        Whether records must match all search queries ('and') or just one
        ('or').

        If set to "and", all queries must match; if set to "or", only one
        query should match. See the "queries" option for more details on
        searching.

    *   random => *bool* (default: 0)

        Return records in random order.

    *   result_limit => *int*

        Only return a certain number of records.

    *   result_start => *int* (default: 1)

        Only return starting from the n'th record.

    *   sort => *array[str]*

        Order records according to certain field(s).

        A list of field names separated by comma. Each field can be prefixed
        with '-' to specify descending order instead of the default
        ascending.

    *   tags => *array*

        Only return records where the 'tags' field equals specified value.

    *   tags.has => *array[str]*

        Only return records where the 'tags' field is an array/list which
        contains specified value.

    *   tags.is => *array*

        Only return records where the 'tags' field equals specified value.

    *   tags.isnt => *array*

        Only return records where the 'tags' field does not equal specified
        value.

    *   tags.lacks => *array[str]*

        Only return records where the 'tags' field is an array/list which
        does not contain specified value.

    *   with_field_names => *bool*

        Return field names in each record (as hash/associative array).

        When enabled, function will return each record as hash/associative
        array (field name => value pairs). Otherwise, function will return
        each record as list/array (field value, field value, ...).

    *   year => *int*

        Only return records where the 'year' field equals specified value.

    *   year.in => *array[int]*

        Only return records where the 'year' field is in the specified
        values.

    *   year.is => *int*

        Only return records where the 'year' field equals specified value.

    *   year.isnt => *int*

        Only return records where the 'year' field does not equal specified
        value.

    *   year.max => *int*

        Only return records where the 'year' field is less than or equal to
        specified value.

    *   year.min => *int*

        Only return records where the 'year' field is greater than or equal
        to specified value.

    *   year.not_in => *array[int]*

        Only return records where the 'year' field is not in the specified
        values.

    *   year.xmax => *int*

        Only return records where the 'year' field is less than specified
        value.

    *   year.xmin => *int*

        Only return records where the 'year' field is greater than specified
        value.

    Returns an enveloped result (an array).

    First element ($status_code) is an integer containing HTTP-like status
    code (200 means OK, 4xx caller error, 5xx function error). Second
    element ($reason) is a string containing error message, or something
    like "OK" if status is 200. Third element ($payload) is the actual
    result, but usually not present when enveloped result is an error
    response ($status_code is not 2xx). Fourth element (%result_meta) is
    called result metadata and is optional, a hash that contains extra
    information, much like how HTTP response headers provide additional
    metadata.

    Return value: (any)

  list_idn_workdays
    Usage:

     list_idn_workdays(%args) -> [$status_code, $reason, $payload, \%result_meta]

    List working days (non-holiday business days) for a certain period.

    Working day is defined as day that is not Saturday*/Sunday/holiday/joint
    leave days*. If work_saturdays is set to true, Saturdays are also
    counted as working days. If observe_joint_leaves is set to false, joint
    leave days are also counted as working days.

    Contains data from years 1990 to 2023

    This function is not exported by default, but exportable.

    Arguments ('*' denotes required arguments):

    *   end_date => *str*

        End date.

        Defaults to end of current month. Either a string in the form of
        "YYYY-MM-DD", or a DateTime object, is accepted.

    *   observe_joint_leaves => *bool* (default: 1)

        If set to 0, do not observe joint leave as holidays.

    *   start_date => *str*

        Starting date.

        Defaults to start of current month. Either a string in the form of
        "YYYY-MM-DD", or a DateTime object, is accepted.

    *   work_saturdays => *bool* (default: 0)

        If set to 1, Saturday is a working day.

    Returns an enveloped result (an array).

    First element ($status_code) is an integer containing HTTP-like status
    code (200 means OK, 4xx caller error, 5xx function error). Second
    element ($reason) is a string containing error message, or something
    like "OK" if status is 200. Third element ($payload) is the actual
    result, but usually not present when enveloped result is an error
    response ($status_code is not 2xx). Fourth element (%result_meta) is
    called result metadata and is optional, a hash that contains extra
    information, much like how HTTP response headers provide additional
    metadata.

    Return value: (any)

FAQ
  What is "joint leave"?
    Workers are normally granted around 12 days of paid leave per year
    (excluding special leaves like maternity, etc). They are free to spend
    them on whichever days they want. The joint leave ("cuti bersama") is a
    government program to recommend that some of these leave days be spent
    together nationally on certain assigned days, especially adjacent to
    holidays like Eid Ul-Fitr ("Lebaran"). It is not mandated (companies can
    opt to follow it or not, depending on their specific situation), but
    many do follow it anyway, e.g. government civil workers, banks, etc. I
    am marking joint leave days with is_joint_leave=1 and is_holiday=0,
    while the holidays themselves with is_holiday=1, so you can
    differentiate/select both/either one.

  When was joint leave established?
    Joint leave was first decreed in 2001 [1] for the 2002 & 2003 calendar
    years. The 2001 calendar year does not yet have joint leave days [2].
    See also [3]. Websites that list joint leave days for 2001 or earlier
    years (example: [4], [5]) are incorrect; by 2001 or earlier, these joint
    leave days had not been officially decreed by the government.

    [1] https://jdih.kemnaker.go.id/data_wirata/2002-4-4.pdf

    [2]
    https://peraturan.bkpm.go.id/jdih/userfiles/batang/Kepmenag_162_2000.pdf

    [3] http://www.wikiapbn.org/cuti-bersama/

    [4] https://kalenderindonesia.com/libur/masehi/2001

    [5] https://kalenderindonesia.com/libur/masehi/1991

  What happens when multiple religious/holidays coincide on a single calendar day?
    For example, in 1997, both Hijra and Ascension Day fall on May 8th. When
    this happens, "ind_name" and "eng_name" will contain all the names of
    the holidays separated by comma, respectively:

     Tahun Baru Hijriah, Kenaikan Isa Al-Masih
     Hijra, Ascension Day

    All the properties that have the same value will be set in the merged
    holiday data:

     is_holiday => 1,
     is_joint_leave => 1,

    The "multiple" property will also be set to true:

     multiple => 1,

    All the tags will be merged:

     tags => ['religious', 'religion=christianity', 'calendar=lunar']

    You can get each holiday's data in the "holidays" key.

  Data for older holidays?
    Will be provided if there is demand and data source.

  Holidays after (current year)+1?
    Some religious holidays, especially Vesakha, are not determined yet.
    Joint leave days are also usually decreed by the government in as late
    as October/November in the preceding year.

  How to calculate the difference of two dates in number of working days?
    Use "count_idn_workdays".

HOMEPAGE
    Please visit the project's homepage at
    <https://metacpan.org/release/Calendar-Indonesia-Holiday>.

SOURCE
    Source repository is at
    <https://github.com/perlancar/perl-Calendar-Indonesia-Holiday>.

AUTHOR
    perlancar <perlancar@cpan.org>

CONTRIBUTOR
    Steven Haryanto <stevenharyanto@gmail.com>

CONTRIBUTING
    To contribute, you can send patches by email/via RT, or send pull
    requests on GitHub.

    Most of the time, you don't need to build the distribution yourself. You
    can simply modify the code, then test via:

     % prove -l

    If you want to build the distribution (e.g. to try to install it locally
    on your system), you can install Dist::Zilla,
    Dist::Zilla::PluginBundle::Author::PERLANCAR,
    Pod::Weaver::PluginBundle::Author::PERLANCAR, and sometimes one or two
    other Dist::Zilla- and/or Pod::Weaver plugins. Any additional steps
    required beyond that are considered a bug and can be reported to me.

COPYRIGHT AND LICENSE
    This software is copyright (c) 2023, 2022, 2021, 2020, 2019, 2018, 2017,
    2016, 2015, 2014, 2013, 2012, 2011 by perlancar <perlancar@cpan.org>.

    This is free software; you can redistribute it and/or modify it under
    the same terms as the Perl 5 programming language system itself.

BUGS
    Please report any bugs or feature requests on the bugtracker website
    <https://rt.cpan.org/Public/Dist/Display.html?Name=Calendar-Indonesia-Ho
    liday>

    When submitting a bug or request, please include a test-file or a patch
    to an existing test-file that illustrates the bug or desired feature.