#s(tz
   (#s(span -inf.0 28800 0 -inf.0 "GMT-8"))
   #s(*zone-span 28800 () "GMT-8")
   (#s(span #s(*date 2039 12 1 0 0 0 28800) 28800 0 2039 "GMT-8")
    #s(span -inf.0 28800 0 -inf.0 "GMT-8")))