Calculate the number of business days in a given period. Also, add convenience methods to Range, Date, and Time.


Add this line to your application's Gemfile:

gem 'work_days'

And then execute:

$ bundle

Or install it yourself as:

$ gem install work_days


Use your own custom work schedule by creating a class implementing your custom holiday methods and including the WorkDays::CalculationMethods module (and optionally the WorkDays::HolidayMethods module for a few of the presets).

class SampleSchedule

  def observed_holidays
    [:new_years_day, :christmas_day]

Then tell the library to use your new schedule:

WorkDays.work_schedule =

You can also use a few pre-built schedules (WorkDays::WorkSchedules::Default, WorkDays::WorkSchedules::Bank).

By default a day is considered a work day as long as it is a week day and it isn't a holiday. You can configure your own week days by overriding the week_day? method in your work schedule class.


These methods can be called either on an instance of your work schedule class or directly on the WorkDays module (as long as you set the WorkDays.work_schedule).

  • work_day?(date)
    • Returns true for week days as long as it isn't a holiday.
  • non_work_day?(date)
    • The opposite of work_day?.
  • work_days_in_range(start_date, end_date)
    • Returns an array of the work days between the start and end dates.
  • work_days_in_month(date)
    • Returns an array of the work days for the year and month of the passed in date.


  1. Fork it
  2. Create your feature branch (git checkout -b my-new-feature)
  3. Commit your changes (git commit -am 'Added some feature')
  4. Push to the branch (git push origin my-new-feature)
  5. Create new Pull Request