To add it to your own calendar: 
Historic Route 66 Calendar of Events
June
27
Decomissioning birthday
Route 66 was decomissioned on June 27th, 1985.
July
4
Independence Day
USA
All over the route, many Independence Day related festivity will be held.
October
31
Halloween
November
11
Route 66 Birthday
Route 66 was officially established on November 11th, 1926.
December
25
Christmas
2014
January
1
New Year
If you find information on an event related to Route 66 missing in the above list, please let us know the details.