A "time clock" is a device or system used to track and record the amount of time someone spends working. It is like a digital clock that helps employers keep track of when employees start and finish their work shifts. Full definition
Even better, the average commute time clocks in at 17 minutes flat, which means you won't have to worry about getting stuck in traffic on the way to work. (creditdonkey.com)
After all, there is no official time clock for labor, for birthing or for women's bodies. (babygaga.com)