On Monday, Aug. 21, 2017, the moon will pass in front of the sun and cast a shadow on all of North America, coast-to-coast, for the first time since 1918. Solar eclipses occur when the moon blocks any part of the sun and – weather permitting – the entire continent will see this once-in-a-lifetime eclipse. (The next total eclipse for United States observers is on April 8, 2024, visible only in the eastern half of the country.)
Arizona will see a 63% solar eclipse, starting at 9:14 a.m. and ending at 12 p.m. The max eclipse will take place at 10:34 a.m.