Day time and night time changes

Is there a guide that shows where I can change the duration of the night time?

I saw that video but, it is for a console interface. The PC interface does not have those 2 lines. Thanks for the reply.

Yes, Thank a ton. I just couldn't find it.

Yes. Thank you for the help. Works like a charm. I also got a script from Scalespeeder that loads preset load out for new spawns. It works great also.