Standard measurement period for all Federal agencies collecting employment data from business establishments; time unit that employers use to pay employees that overlaps the 12th of the month; length of the pay period does not matter, as long as the 12th of the month is included in the pay period: For establishments with a Monday-through-Friday pay period, if the 12th of the month falls on a Saturday, it should be taken as the last day of the requested pay period, and if the 12th of the month falls on a Sunday, it should be taken as the first day of the requested pay period.