Answer: New Year's Eve
While the launch of men and women into space by nature seems highly technological and futuristic, NASA's Space Shuttle program featured many Elements of this were downright anachronistic as the shuttles retired. One of the side effects of operating a spacecraft with computer chips from the 1
It was the utmost caution and desire to safely bring home any crew that caused NASA to approach the annual rollover from December 31 to January 1 with a stance that was "better than forbearance" was. The engineers were particularly worried that the Year-End Rollover event (YERO) could cause disruption to the flight software that could endanger the crew. Even when they conducted extensive testing in 2007 and developed a solution to ensure safety, they remained cautious.
Over the period of 135 shuttle flights between 1981 and 2011, no shuttle has ever been launched in space. or led to New Year to avoid unforeseen problems with the on-board systems.