PostgreSQL timezone

Issue

The time zone of PostgreSQL is set as UTC.
・Is there any recommended setting for Liferay?
・Is there any issue for Liferay if TimeZone is set to UTC?

It is recommended or best practice to have the same timezone in the Liferay server and database.
However, as mentioned in the below documentation, it is advised that you leave the JVM time zone as GMT at all times. This will be the standard based on which each date is stored in the portal's database. When the portal needs to display one stored date to the end users, the portal calculates the display date based on the current date of the application server (this date is affected by the configured JVM level time zone) and the stored GMT format date.