September 2025 Calendar Is Live—Download Free Printable Templates, Holiday Dates & Must-Know Planning Tips

September 2025 offers planners, travelers, and holiday-hunters a neatly organized 30-day grid that starts on a Monday and ends on a Tuesday. With Labor Day falling on Monday, September 1, the month opens with a built-in long weekend that many families use for one last summer trip or a quiet reset before school routines kick in. Key dates and holidays • Labor Day – Monday, September 1 • Grandparents’ Day – Sunday, September 7 • Patriot Day & National Day of Service – Thursday, September 11 • Rosh Hashanah begins at sundown – Monday, September 22 • First Day of Fall (Autumnal Equinox) – Monday, September 22 • Constitution/Citizenship Day – Wednesday, September 17 • Gold Star Mother’s & Family’s Day – Sunday, September 28 Why the September 2025 calendar stands out 1. Perfect work-week symmetry Because the 1st lands on a Monday, every work week (Mon–Fri) fits cleanly into the grid, making printable September 2025 calendars easy to read and ideal for shift scheduling. 2. Two Monday holidays Both Labor Day and the Autumnal Equinox/Rosh Hashanah kickoff arrive on Mondays, creating two natural three-day weekends in one month. 3. Early path to fall travel deals Airlines historically drop fares after Labor Day. With the equinox arriving on the 22nd, September 2025 gives bargain hunters a three-week window of lower prices before peak autumn foliage rates begin. Moon phases • First Quarter – Tuesday, September 2 • Full Harvest Moon – Tuesday, September 9 • Last Quarter – Wednesday, September 17 • New Moon – Wednesday, September 24 Productivity tip Download a printable September 2025 calendar template (landscape PDF or editable Excel) and block out the two Monday holidays first. This visual cue helps you protect long weekends from last-minute meetings and ensures smoother project timelines. Travel tip If you’re chasing fall colors, book departures for the weekend of September 19–22: you’ll catch early foliage in the Rockies and enjoy cheaper mid-September flight prices before the October rush. Bottom line Whether you need a printable planner, are counting down to autumn, or simply want to maximize holiday time, the September 2025 calendar delivers a clean four-week structure, two strategic long weekends, and a front-row seat to the first days of fall.