Add Koungou (Mayotte) 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 Koungou (Mayotte) is EAT, whose offset is GMT+3 from Greenwich Mean Time (GMT).

The IANA timezone identifier for Koungou, Mayotte is "Indian/Mayotte"

It currently does not observe Daylight Savings Time.