Aug. hours in Denver, 3 letters
Boulder summer hrs., 3 letters
Colo. clock setting, 3 letters
Denver setting, in Aug., 3 letters
Denver summer time: Abbr., 3 letters
Midyear Grand Canyon setting (abbr.), 3 letters
N. Mex. clock setting, 3 letters
Rockies summer setting: Abbr., 3 letters
Summer Billings hrs., 3 letters
Summer clock setting in the Rockies, 3 letters
Summer clock setting, in the Rockies: Abbr., 3 letters
Summer hrs. in Denver, 3 letters
Summer hrs. in Helena, 3 letters
Summer hrs. in the Rockies, 3 letters
Summer hrs. in Wyoming, 3 letters