September 2027 calendar with holidays
4 holidays30 days21 working daysISO weeks 35–39
Federal holidaysObservancesReligious dates
| ISO week | Sun | Mon | Tue | Wed | Thu | Fri | Sat |
|---|---|---|---|---|---|---|---|
| 35 | |||||||
| 36 | |||||||
| 37 | |||||||
| 38 | |||||||
| 39 |
Federal holidays
- Labor DayMon Sep 6
Observances
- Patriot DaySat Sep 11
- National Grandparents DaySun Sep 12
Religious dates
- MabonThu Sep 23
About this calendar
September 2027 carries 4 holidays in total: 3 on the US secular calendar and 1 religious. Only 1 is a day off — a tinted cell here marks an observance, not a holiday from work.
Jewish and Islamic dates begin at sunset on the evening before the day shown, and the Islamic ones follow the Umm al-Qura calendar, where local moon sighting can move observance by a day. Hindu festivals are not listed: they are lunisolar and vary by region and by panchang, and a guess would be worse than an absence.