Yes, the Dominican Republic enthusiastically celebrates Día de los Reyes Magos (Three Kings Day / Epiphany) on January 6. It is a major cultural and religious holiday, often more anticipated by children than Christmas.
While Santa Claus (Papá Noel) has gained ground due to US influence, Los Reyes remain the primary gift-givers in Dominican tradition. Schools and many businesses close. The holiday extends the Christmas season (which starts with Nochebuena Dec 24) to a full 12 days of celebration.
For visitors: Expect festive street life, closed offices, and a joyful, family-centered atmosphere on January 6.