go-japanese-holiday installation clone and make $ make you will get the holiday command usage happy holiday $ holiday && echo 'Yahoooo!' working day $ holiday || echo 'die' caution It supports only Japanese holiday of 2016 and 2017. data source Cabinet Office, Government of Japan (内閣府) http://www8.cao.go.jp/chosei/shukujitsu/gaiyou.html http://www8.cao.go.jp/chosei/shukujitsu/syukujitsu.csv