clock on

clock on (third-person singular simple present clocks on, present participle clocking on, simple past and past participle clocked on)

1. (literally, UK) To record one's time of arrival at work, traditionally by inserting one's card into a timestamping machine.
2. (by extension, UK) To begin work at the start of the day or start of one's shift.
3. (informal, intransitive) To grow older; to proceed.

   His birthday was another reminder of his life clocking on.

• clock in
• clock off
• clock onto
• clock out