2027 - the deadline looms
I shovelled code for one large Y2K-befuddled company. They had systems from the 1980s that used YYMMDD. We had to window those.
And they had systems from the 1960s and 1970s that used a 16-bit date format - nine bits for day of year; 7 bits for year, beginning 1900. So they could happily store dates up til the end of 2027.
We barely touched that date processing - time was short, and 2027 was impossibly far off.
But, if 2027 ever happens, they literally run out of bits.
I wait for the phone to ring with an urgent contract ....