Etylmology of the Day

"Nick of Time":
How did we get the expression "in the nick of time"?

In medieval days a "tally" was used to register attendance in colleges and churches. The "tally" was a stick of wood and attendance was indicated by a "nick" or notch on it. The student or worshipper who arrived in time had his/her attendance "nicked"- and so arrived "in the nick of time."