National days, ongoing national weeks and months, and global observances for September 18, 2026. Plus historical events and birthdays.
September 18, 2026 celebrates National Cheeseburger Day, plus 4 more. National Cheeseburger Day on September 18 honors America's favorite sandwich with a slice of cheese. Let's celebrate this delicious food holiday together!
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In the United States, the third Friday in September honors National POW/MIA Recognition Day. The day serves as a call to action, reminding the nation to rededicate our efforts.
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On the third Friday in September, National Tradesmen Day honors the men and women whose skills and hard work build America. And, their skills keep it running strong. The day recognizes the professionals who maintain the complex infrastructure of our roads, cities, water systems, and power grids.
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National HIV/AIDS and Aging Awareness Day on September 18 highlights the number of people living longer with HIV/AIDS.
Read the full story →Longer-running observances that include this date.
National Construction Appreciation Week
Week
National Security Officer Appreciation Week
Week
National Indoor Plant Week
Week
National Rehabilitation Awareness Week
Week
National Farm Safety And Health Week
Week
National Surgical Technologists Week
Week
National Farm Animals Awareness Week
Week
National Eczema Week
Week
National Coupon Month
Month
Self-care Awareness Month
Month
National Recovery Month
Month
Hispanic Heritage Month
Month
National Suicide Prevention Month
Month
National Preparedness Month
Month
National Library Card Sign-up Month
Month
National Potato Month
Month
Self-improvement Month
Month
Classical Music Month
Month
Better Breakfast Month
Month
National Chicken Month
Month
Showing the first 12 — See all months for September.
