#s(tz
   (#s(span -inf.0 43200 0 -inf.0 "GMT-12"))
   #s(*zone-span 43200 () "GMT-12")
   (#s(span #s(*date 2039 12 1 0 0 0 43200) 43200 0 2039 "GMT-12")
    #s(span -inf.0 43200 0 -inf.0 "GMT-12")))