You could use timers for them, like this:
Code:
/timerloadmyscripts -io 19:00 1 1 myscripts load
/timerunloadmyscripts -io 7:00 1 1 myscripts unload


Could even put them in an on start event, like so:
Code:
on *:start: {
  timerloadmyscripts -io 19:00 1 1 myscripts load
  timerunloadmyscripts -io 7:00 1 1 myscripts unload
}

Note: Use /help /timer for more information. (look for /timer9)