Turn Back the Clock Night

From BR Bullpen

Turn Back the Clock Night is a promotion used in Major League Baseball. Teams compete in uniforms from their past, often in championship season attire. This promotion has been adopted throughout the league, sometimes even seeing only one team wearing past uniforms on certain days of the schedule. Most often the uniforms are vintage uniforms for the same teams, but, at other times, they are uniforms of minor league predecessors of the Major League teams or even uniforms from prior locations of the current franchise or Negro League clubs from the area.

Some instances when this promotion occurred include:

7/29/07 Oakland Athletics at Seattle Mariners (1977 uniforms--both teams)
6/23/07 LA Dodgers (1955 Brooklyn) at Tampa Bay (1950s St Petersburg minor league)
6/02/07 Detroit Tigers at Cleveland Indians (1977 uniforms--both teams)
07/09/06 Detroit Tigers (1969 uniforms) at Seattle Mariners (1969 Seattle Pilots)
05/20/06 Pittsburgh Pirates (Homestead Grays Negro Leagues team) at Cleveland Indians (Cleveland Buckeyes)
06/24/06 Atlanta Braves ("1970s era Atlanta uniform") at Tampa Bay (1975 Tampa Tarpons minor leaguers)
08/12/06 St. Louis Cardinals (1930s Negro League St. Louis Stars) at Pittsburgh Pirates (Homestead Grays)
05/11/07 St. Louis Cardinals at San Diego Padres (both 1972 uniforms)