I believe the most spectacular event is going to be the Unix timestamp 2 000 000 000 which is still 9½ years away: 2033-05-18 03:33:20 UTC. Such an event occurs only once every 33 years 8 months approximately!
Egads! 33 years! I spent my late 90:ies mudding[0] and for some reason we had a lot of save files named by their epoch timestamp. When I ended up responsible for parts of the code base, I spent a lot of time dealing with those files, and they were all in the 800- or 900- million range. At some point I was pretty much able to tell at a glance roughly what date any number in that range corresponded to, within perhaps a few weeks.
Weird environments foster weird super powers.
Unix timestamp 1 600 000 000 was not too long ago. That was on 2020-09-13 12:26:40 UTC. Discussed on HN back then here:https://news.ycombinator.com/item?id=24452885
My own blog post here commemorating the event:https://susam.net/maze/unix-timestamp-1600000000.html
Given that 100 000 000 seconds is approximately 3 years 2 months, we are going to see an event like this every few years.
I believe the most spectacular event is going to be the Unix timestamp 2 000 000 000 which is still 9½ years away: 2033-05-18 03:33:20 UTC. Such an event occurs only once every 33 years 8 months approximately!
By the way, here's 1700000000 on Python:
GNU date (Linux): BSD date (macOS, FreeBSD, OpenBSD, etc.):