September 2026 in Poland
3 holidays / observances this month. Notable dates include Anniversary of the outbreak of the Second World War in Poland, Anniversary of the Soviet invasion of Poland, Boy's Day. See the full 2026 calendar or holidays list.
Calendar
September 2026 — Poland
Full September 2026 calendar for Poland. Tap a marked day for holiday details.
Public / federal holidayObservanceInternational dayToday
September 2026
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Holidays in September
3 dates
Anniversary of the outbreak of the Second World War in Poland
Tue, Sep 1 · Observance
Anniversary of the Soviet invasion of Poland
Thu, Sep 17 · Observance
Boy's Day
Wed, Sep 30 · Observance