September 2026 in Tonga
1 holiday / observance this month. Notable dates include Birthday of His Royal Highness The Crown Prince Tupotoʻa-ʻUlukalala. See the full 2026 calendar or holidays list.
Calendar
September 2026 — Tonga
Full September 2026 calendar for Tonga. Tap a marked day for holiday details.
Public / federal holidayObservanceInternational dayToday
September 2026
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Holidays in September
1 dates
Birthday of His Royal Highness The Crown Prince Tupotoʻa-ʻUlukalala
Thu, Sep 17 · Public holiday