LOL. Beware if you own 32-bit UNIX Systems.
From my Operating Systems book –
On computers using 32-bit words, the maximum value “time” can return is 2^32 – 1 seconds…This value corresponds to a little over 136 years. Thus in year 2106, 32-bit UNIX systems will go berserk, not unlike the famous Y2K problem that would have wreaked havoc with the world’s computers in 2000, were it not for the massive effort the IT industry put into fixing the problem. If you currently have a 32-bit UNIX system, you are advised to trade it in for a 64-bit one sometime before the year 2106.