We’re using jqwidgets-ver8.3.2 at the moment.
We are facing issue in displaying appointments when local timezone and scheduler timezone is different.
Our local timezone is “Indian Standard Time(IST)” and scheduler timezone is “Eastern Standard time(EST)”.
We have added appointment on 13th March 2020 from 5:00 p.m to 6:00 pm (IST) as shown in the below pic.

It is displaying in correct time in the scheduler but when we open the appointment time shown is 1 hour earlier than the added time.

We have added another appointment on 13th March 2020 from 6:00 pm to 6: 30 pm (IST) as shown in the below pic.

The second appointment is displaying half an hour earlier then the expected time.

We are maintaining requested appointment in sql server database table.
In our database table appointment requested time is stored in UTC format correctly.