When you arrive in Dubai, you will receive a paper copy of your online application. You will have the opportunity to make any updates or corrections (flight time, etc.). At that opportunity you can adjust your availability date. If you tell them two days, they will expect you to be here in three. If you tell them thirty days, that is what they want, and if you tell them three months, that too will be what they expect. I told them sixty days, they gave me sixty. Hope that helps a bit.