Probably what this comment is suggesting: https://news.ycombinator.com/item?id=32700347 https://news.ycombinator.com/item?id=32700347 That given the 10-bit lim

Probably what this comment is suggesting: https://news.ycombinator.com/item?id=32700347 https://news.ycombinator.com/item?id=32700347 That given the 10-bit limitation, some devices chose their own epoch date to get as much use of the 10-bits as possible. Meaning they chose some arbitrary date earlier than the device manufacture date.