If you're old enough to remember the Y2K scare in 1999, you might actually get to see some of the chaos they promised back then this weekend. Some older computers that rely on the 24 Global Positioning System satellites orbiting the Earth could go 20 years out of date at 7:59 Eastern Time tomorrow night.
When they designed the system in 1980 they only had enough storage space for little more than one thousand weeks. When it hits the limit, which is Saturday, the counters reset to zero. Most utilities and major businesses have been getting warnings of the change for a couple of years.
In 1999 there were many worries that older computers would not be able to adjust to the Year 2000 date change, and it would cause a lot of trouble. However, there were few problems after months of hype.