The Broadcast Calendar is designed to conform to a uniform billing period and was adopted by broadcasters, agencies and advertisers for billing and planning functions. The standard broadcast week starts on Monday and ends on Sunday. The standard broadcast month ends on the last Sunday of the calendar month.
The Nielsen Company measures local quarter-hour television viewing in TV homes across 210 markets. There are 56 metered markets – including 24 local people meter markets, and 154 diary-only markets. Survey dates include four major “sweeps” in February, May, July and November with additional survey periods for various markets. Local people meter markets have 12 survey periods per year.