At midday April 1, 1933,
Rafael Trujillo ordered a decree that established a national time zone for the Dominican Republic, which was set to five hours behind
Greenwich Mean Time (GMT). Prior to that, time in the Dominican Republic was governed by
Santo Domingo Mean Time, which was 4 hours and 40 minutes behind GMT. On October 27, 1974, the Dominican Republic moved from
Eastern Standard Time to Atlantic Standard Time. == IANA time zone database ==