The host university will normally contact you regarding accommodation when they accept you.
This depends per host university. Some offer assistance and in some cases, you will have to look for your own accommodation. You will need to contact the host university regarding accommodation information.
This date is set by system and the actual dates differ per host university. You will need to update the date when you receive information from the host university.
We would like to advise you to contact the host university in this case as they might be able to assist you in this case.