#s(tz
   (#s(span #s(*date 1999 1 1 0 0 0 -25200) -25200 0 1999 "M~aT")
    #s(span #s(*date 1999 10 31 2 0 0 -21600) -25200 0 1999 "MST")
    #s(span #s(*date 1999 4 4 2 0 0 -25200) -25200 3600 1999 "MDT")
    #s(span #s(*date 1998 10 25 2 0 0 -21600) -25200 0 1998 "MST")
    #s(span #s(*date 1998 4 5 2 0 0 -25200) -25200 3600 1998 "MDT")
    #s(span #s(*date 1997 10 26 2 0 0 -21600) -25200 0 1997 "MST")
    #s(span #s(*date 1997 4 6 2 0 0 -25200) -25200 3600 1997 "MDT")
    #s(span #s(*date 1996 10 26 2 0 0 -21600) -25200 0 1996 "MST")
    #s(span #s(*date 1996 4 6 2 0 0 -25200) -25200 3600 1996 "MDT")
    #s(span #s(*date 1970 1 1 0 0 0 -28800) -25200 0 1970 "PST")
    #s(span #s(*date 1949 1 14 0 0 0 -25200) -28800 0 1949 "MST")
    #s(span #s(*date 1942 4 24 0 0 0 -21600) -25200 0 1942 "CST")
    #s(span #s(*date 1932 4 1 0 0 0 -25200) -21600 0 1932 "MST")
    #s(span #s(*date 1931 10 1 0 0 0 -21600) -25200 0 1931 "CST")
    #s(span #s(*date 1931 5 1 23 0 0 -25200) -21600 0 1931 "MST")
    #s(span #s(*date 1930 11 15 0 0 0 -21600) -25200 0 1930 "CST")
    #s(span #s(*date 1927 6 10 23 0 0 -25200) -21600 0 1927 "MST")
    #s(span #s(*date 1921 12 31 23 36 8 -26632) -25200 0 1921 "LMT")
    #s(span -inf.0 -26632 0 -inf.0 "LMT"))
   #s(*zone-span -25200 () "MST")
   (#s(span #s(*date 1921 12 31 23 36 8 -26632) -25200 0 1921 "LMT")
    #s(span -inf.0 -26632 0 -inf.0 "LMT")))