[Daffynition]

As far as I know, the shift is shortened in summer, to 1/2 hour. Winter is a one hour shift.

If you’ve ever been in DC in the summer...I can understand why.

Perhaps you’ll find your info here:
http://www.arlingtoncemetery.mil/Explore/Changing-of-the-Guard

[Dawn53Fl]

Thanks for the info and the link.