Crystal library for calculating sunrise and sunset times. Uses the algorithm from https://www.esrl.noaa.gov/gmd/grad/solcalc/solareqns.PDF
-
Add the dependency to your
shard.yml
:dependencies: suntime: github: captn3m0/suntime
-
Run
shards install
require "suntime"
# Time is optional, local time is used otherwise
# It returns sunrise/sunset for TODAY, so if you want the next sunset, check accordingly
s = Suntime::Suntime.new(lat,long, time)
# Bangalore
s = Suntime::Suntime.new(12.955800, 77.620979)
s.sunrise
# 2020-05-22 05:52:48.0 +05:30 Local
s.sunset
# 2020-05-22 18:39:43.0 +05:30 Local
You can pass in a different time. The date is used for calculating the sunrise/sunset, and the timezone is used for return formatting.
- Implement the Atmospheric Refraction Effect calculation
- Uncomment true_solar_time after converting it to proper time object
- Fork it (https://github.com/captn3m0/suntime/fork)
- Create your feature branch (
git checkout -b my-new-feature
) - Commit your changes (
git commit -am 'Add some feature'
) - Push to the branch (
git push origin my-new-feature
) - Create a new Pull Request
- Nemo - creator and maintainer
Licensed under the MIT License. See LICENSE file for details.