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= Parsi Date
This is an implementation of {Solar Hijri Calendar}[http://en.wikipedia.org/wiki/Solar_Hijri_calendar]
(some times referred to as Jalali or Persian Calendar) which is Iran's official calendar.
Main aim of this gem is to create a Solar Hijri date library as close as possible to the built-in date library.
Conversion algorithm originally adopted from {here}[http://www.fourmilab.ch/documents/calendar/].
== Usage
You can use <tt>Parsi::Date<\tt> and <tt>Parsi::DateTime<\tt> objects as +Date+ and +DateTime+ objects
For example:
a = Parsi::Date.today # => #<Parsi::Date: 1391-08-09 (4912461/2,0/1)>
b = a >> 12 # => #<Parsi::Date: 1392-08-09 (4913193/2,0/1)>
a.upto(b).select{ |d| d.sunday? }.count # => 52
Parsi::Date.leap? 1391 # => true
c = Parsi::Date.parse "1391/10/12" # => #<Parsi::Date: 1391-10-12 (4912587/2,0)>
c.strftime "%A %d %B %Y" # => "سهشنبه 12 دی 1391"
c.strftime "%^EA %d %^EB %Y" # => "Seshambe 12 Day 1391"
For converting a +Date+ or +DateTime+ object just call +to_parsi+ (aliased to +jalali+ and +to_jalali+) on it.
To convert back use +to_gregorian+.
d = Date.civil(2012, 10, 30).to_parsi # => #<Parsi::Date: 1391-08-09 (4912461/2,0/1)>
d.to_gregorian # => #<Date: 2012-10-30 ((2456231j,0s,0n),+0s,2299161j)>
Copyright (c) 2012 Hassan Zamani, released under the MIT license.
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