This library computes bank holidays dates for France, for a given year.
gem install jours_feries_france
require 'jours_feries_france'
puts JoursFeriesFrance.est_ferie(Date.new(2019,01,01))
#return true
puts JoursFeriesFrance.est_ferie(Date.new(2019,03,31))
#return false
This software is available under the MIT license and was inspired / copied from https://github.com/AntoineAugusti/jours-feries-france