David Groves' (https://www.fibrecat.org/) talk at #NetMCR about measuring and calculating the current time was really interesting, explaining crazy timezones, how DST has changed over the years, leap years and seconds, and then how computers sync time to each other via #NTP and #PTP.

I learnt that you can even get expansion cards that have mini atomic clocks on them! (https://www.opencompute.org/products/319/ocp-time-card-made-by-time-beat)

Sadly I couldn't stay and chat afterwards as I had to get my train