There is a bug in the new email system calendar. When you try and drag the appointment to a different time on the same day (i.e push it back half an hour) it moves the appointment to the previous day at the same time.
Is this a bug that is being looked at as it is very annoying?
In continuation with our previous post on all the exciting updates and improvements that have shaped Zoho Calendar over the past 12 months, Lets delve into more: Bring your calendars together- Introducing Zoho Calendar and Outlook calendar synchronisation