Indeed we do not. Whether you have a monthly salary (we don't really do annual salaries, just a cultural difference I guess) or an hourly wage in your contract, you're entitled to overtime (at 1.5x on non-holiday non-night times - rate can get even higher for holidays and particularly holiday nights, and if you're salaried, it's just calculated off your average hourly rate for the month before the overtime) and on-call fees. When I first learned this was not the case in the US, it was actually shocking to me. Holidays are double pay even if it's not overtime.