Add Koumra (Tchad) 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 Koumra (Tchad) is WAT, whose offset is GMT+1 from Greenwich Mean Time (GMT).

The IANA timezone identifier for Koumra, Tchad is "Africa/Ndjamena"

It currently does not observe Daylight Savings Time.