Building a Broadcast Clock: The Math Behind Radio Station Programming Schedules By the KAVANA engineering team -- June 2026 The broadcast clock defines what happens in each minute of an hour: news at :00, traffic at :15, music rotation at :02-:12, commercial break at :20-:24. The implementation challenges are different from general scheduling problems. The Core Constraint: Hard Time Boundaries A broadcast clock is not a soft deadline system. When the clock says news starts at :00, news starts at