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A Spinal Tap Reunion The 25th Anniversary London Sell-Out - 1992 TV was released on:
USA: 31 December 1992
Rowan and Martin's Laugh-In 25th Anniversary Reunion - 1993 TV was released on:
USA: 7 February 1993
UK: 26 December 1995
Yes. It should be the 25th Wedding Anniversary.
25th anniversary of the first release is Feb 21st, 2011.