From KTXS.com on December 15, 2011:
The Texas Rangers today announced a number of initiatives that will be taking place in conjunction with the team’s 40th Anniversary season in 2012.
The Rangers first year in Texas was 1972 after the franchise moved from Washington, D.C. following the 1971 season.
“We have a number of special initiatives planned to commemorate our 40th Anniversary,” commented Rangers CEO and President Nolan Ryan. “A number of memorable events and players have been a part of this franchise since 1972, and we will recognize our history all season.”
The Rangers will wear a 40th Anniversary patch on the right sleeve of the team’s white, blue, red, and grey jerseys throughout the 2012 season. The red, blue, and grey patches in the shape of the State of Texas will make their debut on the Rangers blue jerseys worn for all spring training games.
In addition, the team has scheduled four “Turn-Back-The-Clock” games in 2012 when the club will wear the home uniform from a different year in Rangers history. The visiting club on each date will be in the road uniforms of the respective years. In addition, the first 30,000 fans will receive a 40th Anniversary promotional item on each date.
The Rangers will also be naming a 40th Anniversary All-Time Team selected in fan balloting to be honored on Saturday, August 11. The local chapter of the Society of American Baseball Research is currently putting together a list of the 40 Most Memorable Moments in Rangers history that will have several applications next season.
Read more here: http://www.ktxs.com/sports/30000573/detail.html