Parse date with I18n

gistfile1.rb

# File: config/initializers/date.rb
# Parse date using Rails I18n or Ruby parse method if it failed.

class Date
  class << self
    def _parse_with_i18n(str, format = :default)
      format ||= :default
      date = Date._strptime(str, I18n.translate("date.formats.#{format}")) || _parse_without_i18n(str)
      date[:year] += increment_year(date[:year].to_i) if date[:year]
      date
    end

    alias_method_chain :_parse, :i18n

    def parse_with_i18n(str, format = :default)
      format ||= :default
      date = Date.strptime(str, I18n.translate("date.formats.#{format}"))
      Date.new(date.year + increment_year(date.year), date.month, date.day)
    rescue ArgumentError
      parse_without_i18n(str)
    end

    alias_method_chain :parse, :i18n

    def increment_year(year)
      if year < 100
        year < 30 ? 2000 : 1900
      else
        0
      end
    end
  end
end