How to calculate next, previous business day in Rails?

Question

How to calculate next and previous business days in Rails?

Answer 1

You may need to calculate business days in the future starting from a Saturday or Sunday. 1 business day after a Monday is the Tuesday, 1 business day from a Sunday should also be Tuesday - the starting weekend day should be ignored. The following achieves this:

class Date

  def business_days_future(inc)
    date = skip_weekend
    inc.times do
      date = date + 1
      date = date.skip_weekend
    end
    date
  end

  # If date is a saturday or sunday, advance to the following monday
  def skip_weekend
    if wday == 0
      self + 1
    elsif wday == 6
      self + 2
    else
      self
    end
  end

end