Year 10,000 problem

class of all potential time formatting and storage bugs that would emerge when the need to express years with five digits
(Redirected from Y10K problem)

The Year 10,000 problem (also known as the Y10K problem, Y10K Bug, and Y10K) is an error machines and computers will encounter when the need to express five digits for a year.

Cultural practicingEdit

Some people[1] practice the art of cutting the last two digits of a decade. For example, the "1970's" becomes just the "70's".[2] However, this becomes a problem, because to keep order, one will now need to take the last three digits, rather than two.[3]

Cultural confusionEdit

This is also a problem because the "000's" might be confused with the legit "00's", representing a new century. Also, the year can overflow with certain computer programs. On Microsoft Excel, for instance, in a cell the date 12/31/9999 is a legit date, but 1/1/10000 causes a problem. The date "ten thousand" is unable to be supported, producing a large negative instead.[4]


So far, the Long Now Foundation is able to preempt the Y10K by adding a "0" in front of the date. So the current year of 2021, will look like 02021. However, it would still be subsceptible to a "Y100K" problem.[5]

Related pagesEdit


  1. Cultural practice of Two-Digit Chop Off.
  2. Chopping It Off., 2010."Cutting Off the Digits: A Cultural Practice". Retrieved September 7, 2010.
  3. Digital Prolonging effects of Y10K. Retrieved 5-7-08.
  4. Date Overflowing: Your Machine in 10000. Long Now Foundation, 2005.
  5. What about 100K? Long Now, 2005.

Other websitesEdit