The time for our meeting on Thursday is listed as 16:30 EST. This is not correct. It should say 16:30 EDT. OASIS Admin tells me they do not have a fix for this.
I do not know what the message that you get will say. I don't know if they convert date/time to your home time.zone.
In any event you should calculate what 16:30 EDT is in your location. The good news is that If I have done the math correctly, if you try to join at the time given you will be an hour early and the Zoom will not be up yet.
Hal