Vncalendar

Add this line to your application's Gemfile:

gem 'vncalendar'

And then execute:

$ bundle

Or install it yourself as:

$ gem install vncalendar

• Convert solar date or Gregorian date - our regular date, to lunar date:

UTC_OFFSET = 7 # Asian/Ho_Chi_Minh
Vncalendar::Converter.solar_to_lunar(Date.new(2014, 9, 23), UTC_OFFSET)

• Convert lunar date to solar date:

UTC_OFFSET = 7 # Asian/Ho_Chi_Minh
LEAP_MONTH_OF_THE_YEAR = 0 # no leap month in this year.
Vncalendar::Converter.lunar_to_solar(Date.new(2014, 8, 30), LEAP_MONTH_OF_THE_YEAR, UTC_OFFSET)

After checking out the repo, run bin/setup to install dependencies. You can also run bin/console for an interactive prompt that will allow you to experiment.

You can run one of these commands to run the test suite:

rake test

# Or:
ruby -Ilib:test test/*

Bug reports and pull requests are welcome on GitHub at https://github.com/kidlab/vncalendar.

This code is ported from this repo https://github.com/vanng822/vncalendar - by Nguyen Van Nhu (@vanng822), which is originally based on the Algorithms for computing lunar calendar (Vietnamese version) by Ho Ngoc Duc.

The gem is available as open source under the terms of the MIT License.