Someone

on *:TEXT:!world:#shinzaki:{ 
  .notice $nick  12 The Current World Is   4 $+( ,%Var,)    12This world was set   3 $duration($calc($ctime - %worldchange $ctime)))    12ago.
  /inc %!world
}
on *:TEXT:!Setworld *:?:{
  if ($nick isop #shinzaki) || ($nick ishop #shinzaki) { 
    /set -s %var $2 
    /unset %worldchange $ctime
    /set %worldchange $ctime
    /notice $nick The new world is $2
    /msg #shinzaki  4 The world has been changed!! Type !world to see the new world
  }
  else { /notice $nick You are not allowed to set a world, only operators are }
}