My Calendar Has Stopped Working - Appointment Times Wrong - Appointments Are Disappearing

Help! All my calendar appointment times are wrong since Daylight Savings Time ended over the weekend in Eastern/New York Time Zone. I don't know how to correct this. I set the meetings for specific times that didn't change, but they got changed on the calendar automatically. Example: I have a meeting for 3:30 p.m. today. When I checked the calendar, it says the meeting is for 2:3o p.m. I didn't make this change. The calendar automatically made it. I checked and this has happened with all the scheduled appointments. I can't change all those appointments manually. And, going-forward, as I add new appointments, I won't know which ones are right and which ones are wrong. How can this be? What can be done?

Another WORSE problem just happened, I went ahead and changed the time for today's appointments...and now they have disappeared from today's calendar all together. What happened? I did a test on an event for Saturday (corrected the time and clicked "save"). I then clicked the calendar forward one month to December, then clicked back to November, and that appointmenet had disappeared from the calendar, too.

Pleasse help me get this fixed. I depend on that calendar.