If you are having issues with changing meeting times in your calendar, it is most likely due to the system not being able to detect your local time zone. You can see which time zone is showing on every page where meetings are listed.
The solution is to save your preferred time zone in your profile settings.
Once on your profile settings, scroll down to the bottom of the page.
From the dropdown, select your preferred time zone, and click SAVE CHANGES.
After updating your time zone, the system will no longer try to detect it automatically but rather show every meeting in this selected time zone.