Add EEST (Eastern European Summer Time) 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 EEST (Eastern European Summer Time) is EEST, whose offset is GMT+3 from Greenwich Mean Time (GMT).

The IANA timezone identifier for EEST, Eastern European Summer Time is "EEST"