clock on

US /klɑːk ɑːn/
UK /klɑːk ɑːn/
"clock on" picture
1.

fichar, registrar la entrada

to record one's arrival at work, especially by punching a time clock

:
I need to clock on by 9 AM to avoid being late.
Necesito fichar antes de las 9 AM para no llegar tarde.
He always clocks on exactly at 8 AM.
Él siempre ficha exactamente a las 8 AM.