55 years ago today - Jun 10, 1965

This will advise you that approval has been granted for limited modification in the design of the garment used in the temple to allow for better fit and greater wearing comfort. The approved modified design for women has a button front rather than string ties, a brassiere top patterned after the brassiere top of garments used for day-time wear, a helanca stretch insert in the back at the waist, and widened overlapping back panels with a helanca stretch piece at the top of each panel and a button to assure [the] panels remaining closed. All other features of the garment, including the collar, long legs, and long sleeves, remain the same as heretofore. The approved modified design of the garment for men has a button front, closed crotch, helanca stretch insert piece in the back at the waist, widened overlapping back panels with a helanca stretch piece at the top of each panel and a button to assure [the] panels remaining closed. All other features of the men's garment also, including the collar, long legs and long sleeves, remain the same as heretofore. Both the button-front and the string-tie-front designs for men and wo men are approved for temple wear; either design may be used. You will note that the basic specifications for the garment remain unaltered.

[[David O. McKay, Hugh B. Brown, and N. Eldon Tanner to temple presidents, June 10, 1965; emphasis in original, quoted in Anderson, Devery; The Development of LDS Temple Worship, 1846-2000: A Documentary History, http://amzn.to/TempleWorship]