Earlier today i looked and my computer was one hour behind. I re-set the clock for the correct time and just now i looked and it was one hour fast....any idea what would cause a computer to change times?
At first I thought it might be due to Daylight Savings Time or some automatic time change, but that doesn't happen for 3 1/2 weeks or so.

There used to be a phone number to call to get a recording about what time it was. So many people have computers and cell phones that tell them what time it is, that number has been dis-continued. We used to call POP-CORN (or POP then any 4 digits...some preferred pop-ACID)
so now: "who you gonna call?" Well, this site has the correct time
if you ever need to know...http://www.time.gov (in U.S. anyway)

This public service is cooperatively provided by the two time agencies of the United States: a Department of Commerce agency, the National Institute of Standards and Technology (NIST), and its military counterpart, the U. S. Naval Observatory (USNO). Readings from the clocks of these agencies contribute to world time, called Coordinated Universal Time (UTC)

Of course those mean people in Greenwich don't celebrate summer time
NOTE: Greenwich Mean Time (GMT) is the same all year around
There is no Summer Time / Daylight Savings Time

in the U.S. daylight savings time (what is the other time called?
Daylight Wasting Time?) changes in the spring and fall. ("spring ahead, fall behind") This year the clocks will be set back on Sun. Nov. 7. The days the clocks are changed are the Second Sunday in March and the First Sunday in November. (officially the time change occurs at 2 a.m. -- I wonder how many people actually change their clocks at that time? ) I also wonder how many people are late or early for school work or other things because they forget to change
their clocks.