Making a "Time" Save/Load

[Undead0dd]

I'm making a Left 4 Dead: Survival Map, pretty much basing on Left 4 dead with some bonuses from WC3, but I don't know how to make a Time save and load system. If I were to alter a save/load system and make it save the time, would that work?
But If I tried, I would get lost in alot of coding.
I'm also talking about the system being in GUI, I'm not familiar with Jass... yet. Help would be appreciated.