The more interesting question would be how did the 5 richest people in 2020 do. My guess is some did better than others. And how does that compare to the S&P.
If you work with people across multiple timezones, it's really useful to be able to open a screen with a set of clocks and glance at the time in every relevant timezone.
If I just have https://time.fyi/timezones bookmarked, it seems to remember the timezones that are important to me. Definitely convenient and far easier than doing multiple searches or using a phone's multiple clocks(?).
This site is useful enough and it's a nice execution.
Having been through this exercise as a former employee of a bank calculating this exact thing, this makes sense to me so is hopefully helpful for the poster.
As someone who never studied computer science formally, I find this perspective fascinating - for me, programming is the tool to solve the problem. It often feels like folks study the tool. And the problem is important too.