Tonga — September 2027

Tonga businesses have 21 working days in September 2027 — that's 30 calendar days minus 8 weekend days and 1 weekday public holiday (Birthday of Crown Prince Tupouto'a-'Ulukalala). Northern-hemisphere autumn and Southern-hemisphere spring typically governs the work-rhythm in September; project deadlines and payroll cycles in Tonga should account for the holiday days listed above. September brings Labor Day in the US and Canada (first Monday) and the start of the Jewish High Holy Days in many years. For pay-period planning, September 2027 contains 4 full work-weeks plus 1 additional weekday, useful when scheduling milestones or quarterly reviews. The working-day count above counts substitute days as a single deduction — it does not double-count when a public holiday falling on a weekend is moved to a Monday or Friday. Use this figure as the authoritative baseline for Tonga payroll-period calculations.