First weekday
Monday
Last weekday
Tuesday
September 2025 in United States has 30 days, begins on Monday, ends on Tuesday, and includes 26 local holidays.
Online calendar
View the full September 2025 calendar for United States with local holidays, month facts, and quick links to nearby dates.
United States time
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United States September 2025 Calendar
First weekday
Monday
Last weekday
Tuesday
September 2025 in United States has 30 days, begins on Monday, ends on Tuesday, and includes 26 local holidays.