Dublin is set to ring in 2026 in spectacular style with the return of the New Year’s Festival Dublin, running from December 30th, 2025 to January 1st, 2026. Inhaler will headline the Countdown Concert at Dublin Castle on New Year’s Eve, followed by the unforgettable Midnight Moment celebration. AdvertisementTrad supergroup BIIRD top the bill at the Countdown Concert Matinee — a family-friendly event at Dublin Castle with an earlier 6.30pm countdown. NYF Fireworks Spectacular (Dec 31) – dazzling fireworks displays over Howth Harbour and Dún Laoghaire Harbour . New Year’s Day Concerts (Jan 1) – free, family-friendly music at Dublin Castle and Meeting House Square.