There was a delightful conference in Copenhagen celebrating that event, and
I was lucky enough to attend. The slides of my talk live here:
http://herpolhode.com/rob/ugly.pdf

I flew back the next day, September 10, 2011, and it was a beautiful clear
night with a stunning view of the city. We sat in the last row of the
plane, and had an unobstructed view of the trade towers as we landed near
midnight. We went home, fell asleep, and were woken by a phone call about
9am.

-rob


On Fri, Sep 9, 2022 at 8:29 AM Dave Horsfall <dave@horsfall.org> wrote:

> https://www.timeanddate.com/on-this-day/september/9
>
> ``Unix time or Unix epoch, POSIX time or Unix timestamp, is a time system
>   that measures the number of seconds since midnight UTC of January 1,
> 1970,
>   not counting leap seconds. At 01:46:40 UTC on September 9, 2001, Unix
> time
>   reached the billionth second timestamp.''
>
> Hard to believe that it was that long ago...
>
> -- Dave
>