Monthly register
Sao Tome and Principe public holidays in September 2026
Sao Tome and Principe has 3 public holidays in September 2026.
September 2026 in Sao Tome and Principe runs 30 calendar days, Northern-hemisphere autumn and Southern-hemisphere spring. Sao Tome and Principe observes 3 public holidays in September 2026: Armed Forces' Day, Day off for Armed Forces' Day, Nationalization of the Roças. 2 of those fall on weekdays and reduce the working-day count accordingly. That leaves 20 working days for Sao Tome and Principe businesses, payroll cycles, and project schedules in September 2026. September brings Labor Day in the US and Canada (first Monday) and the start of the Jewish High Holy Days in many years. For broader context, see the full 2026 calendar for Sao Tome and Principe or the global view of holidays observed in September 2026 across all 190 countries we cover.
20
Working days
8
Weekend days
2
Public holidays
30
Days in September
- Sep6
Armed Forces' Day
Sunday, September 6, 2026
- Sep7
Day off for Armed Forces' Day
Monday, September 7, 2026
- Sep30
Nationalization of the Roças
Wednesday, September 30, 2026
Coming up in Sao Tome and Principe
- Dec 21São Tomé Day
- Dec 25Christmas Day
Long weekends in September
Sao Tome and Principe has 2 long weekends in September 2026
Nationalization of the Roças · 5d · Armed Forces' Day & Day off for Armed Forces' Day · 4d
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