class Pagy::Calendar::Unit

Used in starting_time_for(page) where page starts from 1 (e.g. page to starting_time means subtracting 1)
Number of time units to offset from the @initial time, in order to get the ordered starting time for the page.

def time_offset_for(page)
  @order == :asc ? page - 1 : @last - page
end