Add Charlestown (Saint Kitts and Nevis) 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 Charlestown (Saint Kitts and Nevis) is AST, whose offset is GMT-4 from Greenwich Mean Time (GMT).

The IANA timezone identifier for Charlestown, Saint Kitts and Nevis is "America/St_Kitts"

It currently does not observe Daylight Savings Time.