Same response as before.
In order for you to know when you are moving , you need to know the closing date.
Believe it or not this is not rocket science, however there is a system, a process to the transaction.
If you don't know the answers, then how can you expect us to know? We are simply hanging out, watching the questions go by.....
The most important thing is to bring this to the attention of you agent ASAP. With some lead time, problems are more easily resolved than when they are popped on you at the last minute.
This is a common concern but in the vast number of cases can be worked out, without jeopardising your deal.
However, this needs to be negotiated in advance, because the buyers also need a place to stay and they need to plan for that. Remember, there are two parties involved here, not just one.
Getting somebody to come and help you, and stay in a hotel is a great idea (treat yourself to a leisure few days off before all the craziness of moving into a new place starts)
You can approach the buyer with a "post settlement occupancy" amendment giving you permission to occupy the house-usually at a cost-until you can move out. If you are only talking about a few hours or 1 day, you may not have too many problems unless the buyer has their moving truck showing up the day of closing. Depending on the rule in CT, they may not actually get "possession" until the settlement has been recorded. In Virginia, the buyer generally takes possession at closing.
Good early communication is your best bet. Hopefully neither agent has aggrevated the other, and you and the buyer had a good negotiation period !