Best way to skip 1-2 hours of night time?

What method can I use that won't affect server performance to skip night time 1-2 hours if it's example 02.00 AM?

I could use a timer that runs constantly, but I would prefer a less resource intensive method.

 

My plan is to execute command env.time 3 when the server time reaches 0200, so I could run a Timer 24/7 that checks if the time is > 2 && < 3 and then run that command - just in case I didn't explain it properly as I don't plan on constantly changing the time of the day like the Day&Night System that already exists.