March, 1999
CRITICAL Y2K TESTING DATES
Y2K Okay? Now the Other Dates
| DATES | TESTING |
| January 1, 1999 | Ensure that the digits "99" do not trigger a red flag, other program subroutine(s), or cause a processing error |
| Fiscal Year 2000 for business and industry | Depending on the business the FY could start on March 1, 1999; July 1, 1999 or match the government fiscal year of October 1, 1999 |
| August 22, 1999 | Overflow of "end of week" rollovers (e.g. GPS) |
| September 9, 1999 (9/9/99 or possibly 9999) | ensure that the digits "99" or "9999" do not trigger a red flag, other program subroutine(s), or cause a processing error |
| October 1, 1999 | First day of Fiscal Year 2000 |
| January 0, 2000 | Ensure that this date is NOT processed (some applications do have this problem and counts January 0 as the day before the 1st |
| January 1, 2000 | Key date in any compliance testing |
| January 3, 2000 | First full work day in the new year |
| January 10, 2000 | First 9 character date |
| February 28, 2000 | Ensure the leap year is being properly accounted for |
| February 29, 2000 | Ensure the leap year is being properly accounted for |
| February 30, 2000 | Ensure that this date is NOT processed |
| February 31, 2000 | Ensure that this date is NOT processed |
| March 1, 2000 | Ensure date calculations have taken leap year into account |
| October 10, 2000 | First 10 character date |
| December 31, 2000 | 366th day of the year |
| January 1, 2001 | First day in the 21st Century |
| January 1, 2001 | Overflow for Tandem systems |
| After January 1, 2002 | Ensure no processing errors occur in backward calculations and processing of dates in the 1980’s and the 1990’s at this point in time |
| February 29, 2001 | Ensure that this date is NOT processed as a leap year |
| February 29, 2004 | Ensure that this date is processed as a leap year |
| January 1, 2010 | Overflow ANSI C Library |
| September 30, 2034 | Overflow of UNIX time function |
| January 1, 2037 | Rollover date for NTP systems |
| January 19, 2038 | Overflow of UNIX systems |
| September 18, 2042 | Overflow of IBM Systems/360 |
| February 28, 2100 | Last day of February – NOT a leap year |