Add William Dean Cay (Turks and Caicos Islands) to your list and use my-locations table to visually convert it's time to another timezone or city time.
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Current time zone for William Dean Cay (Turks and Caicos Islands) is EDT, whose offset is GMT-4 from Greenwich Mean Time (GMT).

The IANA timezone identifier for William Dean Cay, Turks and Caicos Islands is "America/Grand_Turk"

DST started on Sunday, March 9 2025 at 2:00 am local time, when time in William Dean Cay moved forward 1 hour to 3:00 am.
DST ends on Sunday, November 2 2025 at 2:00 am local time, when time in William Dean Cay moves back 1 hour to 1:00 am.