New and have questions!

[clg82]

Hello everyone, I have been playing the sims for years, and just started posting on forums.  I just yesterday purchased the sims 3 and played it the majority of the evening.  Up to the point of having my first birthday and party.  My question is why does it show that my next birthday will be in 30 "sim days" and that I will become elderly?  Doesn't that seem to quick?  I have been doing great and progressing nicely in my career, and I don't want it to end anytime soon!  Any input would be greatly appreciated! ~Chris