The first attempt to launch Space Shuttle Columbia on her maiden voyage is called off due to problems with the shuttle’s sophisticated system of redundant flight computers, some of which fail to synchronize with each other during the countdown. Over 24 hours are required to fix the bug, and the launch is delayed by two days.
theLogBook.com
https://www.theLogBook.com
Earl Green is the creator, curator, and head writer of theLogBook.com.
Also of interest...
STS-86: seventh Shuttle-Mir docking
September 25, 1997
STS-50
June 25, 1992
Soyuz TMA-9 / Expedition 14
September 18, 2006