Then I'd compare 2 ctime values: the current vs. a calculated one
; starting a looping timer instead of repetitive calling a 1min timer 
alias StartCheck { .timerCheckTime 0 60 CheckTime }

; checking alias triggered by the looping timer
alias -l CheckTime {
  ; if condition is matched: do stuff and stop the looping timer 
  if ($ctime > $ctime($date 20:50:00)) { 
    flash -r10 UNBANNED 
    .timerCheckTime off

(untested) smile