Add Muscat (Oman) to your list and use my-locations table to visually convert it's time to another timezone or city time.
Mouse over the colored hour-tiles and glance at the hours selected by the column.

Current time zone for Muscat (Oman) is Asia/Muscat, whose offset is GMT+4 from Greenwich Mean Time (GMT).

The IANA timezone identifier for Muscat, Oman is "Asia/Muscat"

It currently does not observe Daylight Savings Time.