I'm going to "celebrate" my birthday (which is on 6th August) by going to Las Vegas and nearby Canyons. 
Estimated plan is:
August 11 - fly to Las Vegas, check in to hotel and chill, walking around the city
August 12 - Grand Canyon Tour
August 13 - take a break, visit places around the city
August 14 - Antelope Canyon
August 15 - take a break, take a flight on a helicopter in the evening
August 16 - Valley of Fire
August 17 - do last visits, check out, fly back
It's possible to adjust the plan, maybe to add something. 

Looking for fun people who like active travel to have a great time in Las Vegas!!