National Tailgating Day in US
National Tailgating Day in US is held on September 6. The 1st Saturday in September. This event in the first decade of the month September is annual. 
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Another truck themed “holiday,” celebrate the return of college football with a tailgating party. Throw the grill and cooler in the back and you are a party on wheels.
Similar holidays and events, festivals and interesting facts
European Bike Week on September 2 (Begins the first Tuesday in September and runs through the end of the week);
World Electric Vehicle Day on September 9
Bus Driver's Day in Argentina on September 24
Motorcyclists' Dignity Day in Venezuela on October 17
National School Bus Safety Week in USA on October 20 (Held during the third full week of October each year, National School Bus Safety Week is an active and evolving public education program and an excellent way for parents, students, teachers, motorists, school bus operators, school administrators, and other interested parties);
Go For a Ride Day on November 22
Truckers' Day in Argentina on December 15
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