I first heard about the Y2K bug in about 1993 from a programmer who was working on updating systems. These were all older systems, often written in COBOL, which did not use epoch time, and in fact didn’t reference system time at all. They’d be doing math on data entered by users, and since they were written back when every byte of memory was precious (and nobody expected that the program would still be in use after 30 years), they’d be doing math on two-digit years. It would certainly be a problem to calculate people’s ages, loan terms, payments due, et cetera, and get negative numbers.
Heck, I remember reading a story about a government system once that marked the residents of Hartford, CT as dead, because somehow the last letter of the city name data overflowed into the next column, and marked them as 'd’eceased. Y2K was definitely a real problem.
I first heard about the Y2K bug in about 1993 from a programmer who was working on updating systems. These were all older systems, often written in COBOL, which did not use epoch time, and in fact didn’t reference system time at all. They’d be doing math on data entered by users, and since they were written back when every byte of memory was precious (and nobody expected that the program would still be in use after 30 years), they’d be doing math on two-digit years. It would certainly be a problem to calculate people’s ages, loan terms, payments due, et cetera, and get negative numbers.
Heck, I remember reading a story about a government system once that marked the residents of Hartford, CT as dead, because somehow the last letter of the city name data overflowed into the next column, and marked them as 'd’eceased. Y2K was definitely a real problem.