#s(tz
   (#s(span -inf.0 0 0 -inf.0 "GMT"))
   #s(*zone-span 0 () "GMT")
   (#s(span #s(*date 2039 12 1 0 0 0 0) 0 0 2039 "GMT")
    #s(span -inf.0 0 0 -inf.0 "GMT")))