Mohammad S Anwar > Calendar-Saka-1.10 > Calendar::Saka

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Module Version: 1.10   Source  

NAME ^

Calendar::Saka - Interface to Indian Calendar.

VERSION ^

Version 1.10

DESCRIPTION ^

Module to play with Saka calendar mostly used in the South indian, Goa and Maharashatra. It supports the functionality to add / minus days, months and years to a Saka date. It can also converts Saka date to Gregorian/Julian date.

The Saka eras are lunisolar calendars, and feature annual cycles of twelve lunar months, each month divided into two phases: the 'bright half' (shukla) and the 'dark half' (krishna); these correspond respectively to the periods of the 'waxing' and the 'waning' of the moon. Thus, the period beginning from the first day after the new moon and ending on the full moon day constitutes the shukla paksha or 'bright half' of the month the period beginning from the day after the full moon until and including the next new moon day constitutes the krishna paksha or 'dark half' of the month.

The "year zero" corresponds to 78 BCE in the Saka calendar.The Saka calendar begins with the month of Chaitra (March) and the Ugadi/Gudi Padwa festivals mark the new year.

Each month in the Shalivahana calendar begins with the 'bright half' and is followed by the 'dark half'. Thus, each month of the Shalivahana calendar ends with the no-moon day and the new month begins on the day after that.

A variant of the Saka Calendar was reformed and standardized as the Indian National calendar in 1957. This official calendar follows the Shalivahan Shak calendar in beginning from the month of Chaitra and counting years with 78 CE being year zero. It features a constant number of days in every month with leap years.Saka Calendar for the month of Phalgun year 1932

            Phalguna [1932]

    Sun  Mon  Tue  Wed  Thu  Fri  Sat
      1    2    3    4    5    6    7
      8    9   10   11   12   13   14
     15   16   17   18   19   20   21
     22   23   24   25   26   27   28
     29   30

MONTHS ^

    +-------+------------+
    | Order | Name       |
    +-------+------------+
    |   1   | Chaitra    |
    |   2   | Vaisakha   |
    |   3   | Jyaistha   |
    |   4   | Asadha     |
    |   5   | Sravana    |
    |   6   | Bhadra     |
    |   7   | Asvina     |
    |   8   | Kartika    |
    |   9   | Agrahayana |
    |  10   | Pausa      |
    |  11   | Magha      |
    |  12   | Phalguna   |
    +-------+------------+

WEEKDAYS ^

    +---------+-----------+----------------+
    | Weekday | Gregorian | Saka           |
    +---------+-----------+----------------+
    |    0    | Sunday    | Ravivara       |
    |    1    | Monday    | Somvara        |
    |    2    | Tuesday   | Mangalavara    |
    |    3    | Wednesday | Budhavara      |
    |    4    | Thursday  | Brahaspativara |
    |    5    | Friday    | Sukravara      |
    |    6    | Saturday  | Sanivara       |
    +---------+-----------+----------------+

METHODS ^

as_string()

Return Saka date in human readable format.

    use strict; use warnings;
    use Calendar::Saka;

    my $calendar = Calendar::Saka->new(1932,12,26);
    print "Saka date is " . $calendar->as_string() . "\n";

today()

Return today's date is Sake calendar as list in the format yyyy,mm,dd.

    use strict; use warnings;
    use Calendar::Saka;

    my $calendar = Calendar::Saka->new();
    my ($yyyy, $mm, $dd) = $calendar->today();
    print "Year [$yyyy] Month [$mm] Day [$dd]\n";

mon()

Return name of the given month according to the Saka Calendar.

    use strict; use warnings;
    use Calendar::Saka;

    my $calendar = Calendar::Saka->new();
    print "Month name: [" . $calendar->mon() . "]\n";

dow()

Get day of the week of the given Saka date, starting with sunday (0).

    use strict; use warnings;
    use Calendar::Saka;

    my $calendar = Calendar::Saka->new();
    print "Day of the week; [" . $calendar->dow() . "]\n";

days_in_month()

Return number of days in the given year and month of Saka calendar.

    use strict; use warnings;
    use Calendar::Saka;

    my $calendar = Calendar::Saka->new(1932,12,26);
    print "Days is Phalguna 1932: [" . $calendar->days_in_month() . "]\n";
    print "Days is Chaitra  1932: [" . $calendar->days_in_month(1932,1) . "]\n";

add_days()

Add given number of days to the Saka date.

    use strict; use warnings;
    use Calendar::Saka;

    my $calendar = Calendar::Saka->new(1932,12,5);
    print "Saka 1:" . $calendar->as_string() . "\n";
    $calendar->add_days(5);
    print "Saka 2:" . $calendar->as_string() . "\n";

minus_days()

Minus given number of days from the Saka date.

    use strict; use warnings;
    use Calendar::Saka;

    my $calendar = Calendar::Saka->new(1932,12,5);
    print "Saka 1:" . $calendar->as_string() . "\n";
    $calendar->minus_days(2);
    print "Saka 2:" . $calendar->as_string() . "\n";

add_months()

Add given number of months to the Saka date.

    use strict; use warnings;
    use Calendar::Saka;

    my $calendar = Calendar::Saka->new(1932,1,1);
    print "Saka 1:" . $calendar->as_string() . "\n";
    $calendar->add_months(2);
    print "Saka 2:" . $calendar->as_string() . "\n";

minus_months()

Minus given number of months from the Saka date.

    use strict; use warnings;
    use Calendar::Saka;

    my $calendar = Calendar::Saka->new(1932,5,1);
    print "Saka 1:" . $calendar->as_string() . "\n";
    $calendar->minus_months(2);
    print "Saka 2:" . $calendar->as_string() . "\n";

add_years()

Add given number of years to the Saka date.

    use strict; use warnings;
    use Calendar::Saka;

    my $calendar = Calendar::Saka->new(1932,1,1);
    print "Saka 1:" . $calendar->as_string() . "\n";
    $calendar->add_years(2);
    print "Saka 2:" . $calendar->as_string() . "\n";

minus_years()

Minus given number of years from the Saka date.

    use strict; use warnings;
    use Calendar::Saka;

    my $calendar = Calendar::Saka->new(1932,1,1);
    print "Saka 1:" . $calendar->as_string() . "\n";
    $calendar->minus_years(2);
    print "Saka 2:" . $calendar->as_string() . "\n";

get_calendar()

Return calendar for the given year and month in Saka calendar. It return current month of Saka calendar if no argument is passed in.

    use strict; use warnings;
    use Calendar::Saka;

    my $calendar = Calendar::Saka->new(1932,1,1);
    print $calendar->get_calendar();

    # Print calendar for year 1932 and month 12.
    print $calendar->get_calendar(1932, 12);

to_gregorian()

Convert Saka date to Gregorian date and return a list in the format yyyy,mm,dd.

    use strict; use warnings;
    use Calendar::Saka;

    my $calendar = Calendar::Saka->new();
    print "Saka: " . $calendar->as_string() . "\n";
    my ($yyyy, $mm, $dd) = $calendar->to_gregorian();
    print "Gregorian [$yyyy] Month [$mm] Day [$dd]\n";

from_gregorian()

Convert Gregorian date to Saka date and return a list in the format yyyy,mm,dd.

    use strict; use warnings;
    use Calendar::Saka;

    my $calendar = Calendar::Saka->new();
    print "Saka 1: " . $calendar->as_string() . "\n";
    my ($yyyy, $mm, $dd) = $calendar->from_gregorian(2011, 3, 17);
    print "Saka 2: Year[$yyyy] Month [$mm] Day [$dd]\n";

to_julian()

Convert Julian date to Saka date and return a list in the format yyyy,mm,dd.

    use strict; use warnings;
    use Calendar::Saka;

    my $calendar = Calendar::Saka->new();
    print "Saka  : " . $calendar->as_string() . "\n";
    print "Julian: " . $calendar->to_julian() . "\n";

from_julian()

Convert Julian date to Saka date and return a list in the format yyyy,mm,dd.

    use strict; use warnings;
    use Calendar::Saka;

    my $calendar = Calendar::Saka->new();
    print "Saka 1: " . $calendar->as_string() . "\n";
    my $julian = $calendar->to_julian();
    my ($yyyy, $mm, $dd) = $calendar->from_julian($julian);
    print "Saka 2: Year[$yyyy] Month [$mm] Day [$dd]\n";

AUTHOR ^

Mohammad S Anwar, <mohammad.anwar at yahoo.com>

BUGS ^

Please report any bugs or feature requests to bug-calendar-saka at rt.cpan.org, or through the web interface at http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Calendar-Saka.I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.

SUPPORT ^

You can find documentation for this module with the perldoc command.

    perldoc Calendar::Saka

You can also look for information at:

ACKNOWLEDGEMENTS ^

This module is based on javascript code written by John Walker founder of Autodesk, Inc. and co-author of AutoCAD.

LICENSE AND COPYRIGHT ^

Copyright 2011 Mohammad S Anwar.

This program is free software; you can redistribute it and/or modify it under the terms of either: the GNU General Public License as published by the Free Software Foundation; or the Artistic License.

See http://dev.perl.org/licenses/ for more information.

DISCLAIMER ^

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

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