I have a twitter bot called time_t_emit that tweets palindromic seconds since the epoch. (somewhat inspired by the now defunct @megasecond)

https://twitter.com/time_t_emit

It's going to tweet twice tomorrow at lunch time (in my time zone) either side of the rollover.

I fondly remember the gigasecond party I went to with a load of friends - it happened in the small hours on Sunday morning, ideal party time for a bunch of geeks in their 20s, like an extra new year's eve!