@Sharon ******
remember there are two dates that you fill in, one is your most recent entry and the other one is when your current stamp expires. (That's the one that people mistake for when their visa expires if they have a long-term visa).
The other one is many offices allow you to apply only from 2 weeks before the due date down until 1 week before the due date. That gives you a one week window to apply online outside that they will reject it