Santo Domingo and Miami share the same time during Eastern Standard Time (November to March). Both effectively use UTC-5/-4. When it's 12:00 PM in Santo Domingo, it's also 12:00 PM in Miami.
The Dominican Republic does not observe daylight saving time. During Miami's daylight saving time (March to November), Miami moves to UTC-4 matching Santo Domingo, so they stay synchronized year-round.
Any time during business hours works! The time is effectively the same in both cities year-round, making coordination easy.
Miami is the main US gateway for Dominican Republic travel. The large Dominican community in South Florida maintains strong connections to the island. Direct flights take about 2.5 hours, with frequent daily service.