A few minutes early, this ONE TIME, for a certain reason? Or, "Instead of 7:30, can we drop them off at 7:15, every day"???
I would **maybe** do that ONCE for a new family. And there had better be a reason for it, such as them going in a little early because it's the first day back. But it would be really clear that it wouldn't be happening again.
People think "What's the big deal, it's just 15 min?". But when I am working a 10 STRAIGHT hour day, 15 min is pretty significant.