I found a Y2K bug a few years ago
I was working as a QA on a project for a tech company a few years ago, who will remain unnamed as I don't want to embarrass Bill and Dave, which used a calendar widget from an unnamed open source software hub which was built around Git. Well I was doing my routine testing, using some manual exploratory testing to augment automated regression testing, when I put in a date in the future. The date the calendar then showed a date in the early 1900s. Imagine my amusement when I got to title the defect report "Y2K bug detected in calendar widget". Imagine the disbelief and amusement when I mentioned it at our next standup.
Which is one of many reasons I don't trust or have a high opinion of programmers.
Which is also why I sometimes feel like weeping.