[ColinEberhardt]

I agree, timelines are fascinating. I did my own research and built a simple visualisation of the changes in time zones over a 120 year period:

https://blog.scottlogic.com/2021/09/14/120-years-timezone.ht...

[ciju]

Nice visualizations. I went the opposite way, showing how many times the timezones were adjusted for different regions, on map (both with and without DST).

https://ciju.in/writings/understanding-timezones