Not a chance that anyone is going to dig into the data that much. There's just a dashboard where it shows how many days we've been in the office each month. It's fed from a monthly download of the gate data, passed to HR, then loaded in.
Honestly the 2-3 levels of management above me couldn't give a monkeys. My immediate boss has even offered to keep swipe my pass a couple of times each week as she's very anti the level of monitoring - but that didn't seem like a good idea so I politely declined.
It might be that they filter out weekends from the data, but this will be a good test of it. It's only just gone live so nobody seems to know.