module TasksHelper
end

class Time
  def self.next_quarter
    now = Time.now
    now -= now.sec
    next_quarter = now + (15 - now.min % 15).minutes
  end
  
  def self.previous_quarter
    now = Time.now
    now -= now.sec
    previous_quarter = now - (now.min % 15).minutes
  end
  
end