My company requires people to consume half a day of PTO if we clock in late by any amount (or leave early by any amount).

We also have a system where if you work on a holiday, you get an extra day's pay, plus 25%, added to your paycheck, but then when you consume the time-off-in-lieu day that that holiday generates, you have 1 day's wage taken back off your paycheck.

And those money-taken-away days are always pushed to the front of the queue -- you can't take any PTO if you have any of those outstanding over the past three months.

So people who work on holidays generally try to not consume any PTO for the next three months so they can keep the money, So if you're suddenly late after working on a holiday, that's half a day's wages, in cash, taken from you.

Now what do you think people who arrive one or two minutes late do? Work 7 hours and 59 minutes while getting paid for 4? Of course not: they just walk right past the time clock, log into their computers as usual, and then later notice that they "forgot" to clock in. They go to the website where this is tracked, put in a request for "forgot to clock in" with their arrival being exactly on time, and don't lose a penny!