next 'for dummies' question

[Jeffry Killen]

Hi;

I am trying to build jpeg image processing library and
./configure complains about new file with older than
distribution files.
And in fact the terminal has the date (today?) as
Mon Jan 2 (time) 2006

How do I set the clock with out access to ntp service
as yet.

I seem to remember seeing some info about cmos/bios
battery being low or dead. (that may have shown up
during installation process... I don't remember)

Thanks for time, attention, and patience
JK