The five flags that have flown over Tucson-- American, Spanish, Mexican, Confederate and the state of Arizona--are presented by color guards in period dress in a ceremony to celebrate Tucson’s 236th birthday at 8:30 a.m., Saturday, Aug. 20. The Tohono O'odham Nation and Pascua Yaqui Tribe flags, and a replica of the 28-star American flag that was brought by the Mormon Battalion also are presented. Live entertainment and refreshments follow. Free. Call or e-mail firstname.lastname@example.org for more information. Visit tucsonsbirthday.org for a calendar of all related events.