end of a 11pm hour block can be set at 00:00:10. In this case last event of days must be at least 10s long. Useful for timing out a block ending with a song to a live network news bulletin starting at 10s past the hour etc.
OR
A more complex/flexible implementation;
A ~ 2 hour TS block of material can start at ~11pm and end at ~1am next day. Block TS is calculated across the two hour block when block commences at 11pm.
In a simple implementation;
OR
A more complex/flexible implementation;