The external System updates the date time field as 2021-03-15T09:00:00.000+0000. When I query the SOQL is also returning the same value. But when EST time zone user logins, the record suppose to show 4 AM instead it is showing 5 AM.
2021-03-15T09:00:00.000+0000(9 AM UTC) is 4 AM EST. But for any time zone user the field value in UI is showing one hour more. Any reason ?