RSU question about when to sell

I just had my first tranche of RSUs vest at the public company I work for. I am not allowed to sell them until the trading window opens at the end of the month.

Here is my question and it may be super silly, but I have minimal experience buying and selling public stock and none selling vested RSUs. Almost everyone in the company who receive RSU grants as part of their annual award will be selling on the same day, which I assume will lower the stock price. Is it at all helpful to put in your sell order at midnight that day or do they close at the end of the day and go by average price anyway? It’s not even a lot of money but it’s already only worth about 60% of what it was when it was originally granted so I want to make sure I get as much out of it as possible.

Thanks !