#s(tz
   (#s(span #s(*date 1969 2 1 0 0 0 0) 25200 0 1969 "zzz")
    #s(span #s(*date 1964 11 1 0 0 0 25200) 0 0 1964 "DAVT")
    #s(span #s(*date 1957 1 13 0 0 0 0) 25200 0 1957 "zzz")
    #s(span -inf.0 0 0 -inf.0 "zzz"))
   #s(*zone-span 25200 () "DAVT")
   (#s(span #s(*date 1957 1 13 0 0 0 0) 25200 0 1957 "zzz")
    #s(span -inf.0 0 0 -inf.0 "zzz")))