Calculate sunrise and sunset times for a given time and place
Ruby
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ruby-sun-times.gemspec

README.md

ruby-sun-times Build Status

Calculates sunrise and sunset times

The algorithm comes from the Almanac for computers.

Usage

Requiring

In a Gemfile/Gemspec:

gem 'ruby-sun-times', require: 'sun_times'

Directly:

require 'sun_times'

Methods

The two methods rise and set each return a Time.

day = Date.new(2010, 3, 8)
latitude = 43.779
longitude = 11.432
sun_times = SunTimes.new
sun_times.rise(day, latitude, longitude) # => 2010-03-08 05:39:53 UTC
sun_times.set(day, latitude, longitude) # => 2010-03-08 17:11:16 UTC

References