The Radio Society of Great Britain sponsors the Islands On The Air (IOTA) Contest this weekend. The Boys in Belize are there to participate. They are on the island of Caye Caulker (NA-073) to qualify as an island station.
Local time in Belize is Central Standard Time.
The most recent (2130Z July 28th) cluster reports have V31MX on 21039.8 kHz CW working this contest.