Historical clue formulations

• "Is Anybody Goin' to San ___" (#1 Charley Pride song) — 2013-09-22
• San ___, Lone Star State city — 2009-11-22
• San ___ (Southern city, casually) — 2005-04-29
• "Is Anybody Goin' to San ___?" (1970 #1 country hit for Charley Pride) — 2005-03-12