Can't Update Time in Club Calendar

Club 3915 - Gator Toastmasters -
As admin, I went into the default Time Zone and corrected it. However, the calendar did NOT update. We meet at 6:30 p.m. Eastern Time US, but it shows us meeting at 2:30 p.m. It does not appear to have updated after I changed from the GMT default to Americas/New York, which should be correct.
Is there something else I need to do?
I am running Window 10 on a laptop and accessing the site via Chrome.

edit the agenda and save the time will be corrected

Thanks for such a fast reply. I was able to update all future agendas so they show properly in the calendar.

Chuck