Excel Countdown Timer

=IF((A1 - GoogleClock()) <= 0, "Event is over", INT(A1 - GoogleClock()) & " Day" & IF(INT(A1 - GoogleClock()) = 1, " , ", "s, ") & INT(MOD(A1 - GoogleClock(), 1)*24) & " Hour" & IF(MOD(A1 - GoogleClock(), 1) < 1/24, "s, and ", IF(MOD(A1 - GoogleClock(), 1) <= 1/12, ", and ", "s, and ")) & INT(MOD(A1 - GoogleClock(), 1/24)*1440) & " Minute" & IF(MOD(A1 - GoogleClock(), 1/24) < 1/1440, "s, and ", IF(MOD(A1 - GoogleClock(), 1/24) <= 1/720, "", "s")))

*there's a bug at 0 Days, 0 Hours, and 0 Minutes that makes it display "0 Days, 0 Hours, and 0 Minutes, and", but the "Event is over" line hides it