Block traffic to node during specific time period

Here is an idea to get you started which used your link above as a starting point. It assumes that you only have 2 pool members so that during each maintenance period there is only one valid pool member

when CLIENT_ACCEPTED {

    Set list of start and end times of each maintenance period
   set lmaint {{0200 0230} {0300 0330}}
    Set list of valid pool member for each maint period
   set lmember {"1.1.1.1" "2.2.2.2"}
    Set current date
   set today [clock format $systemTime -format %D]
    Get the current time in seconds since the Unix epoch of 0-0-1970
   set now [clock seconds]

    Cycle through each maintenance period,  checking current time
   foreach maint $lmaint member $lmember {
       Convert start/end times to seconds from the epoch for easier date comparisons
      set start [clock scan "$today [lindex $maint 0]" -format "%D %H%M"]
      set end [clock scan "$today [lindex $maint 1]" -format "%D %H%M"]

       Check if the current time is between the start and end times
      if {$now > $start && $now < $end}{
         pool [LB::server pool] member $member 80
      }
   }
    Default action is to use the virtual server default pool
}