G. Fieendish said:
No, Television used to close down before midnight, until the mid/late 1980's..... (In 1973, for example, Closedown was 10:30pm)
Generally, the last programme before transmission shut down was
usually called "Night Thoughts" or somthing similar, & in the BBC's case followed by the National Anthem.
The "Childrens Truce" was in the 1950's, & was broken by ITV...