I've been dealing with time and timezones for a long time, but this is the first time I have ever seen the "[Olson/Name]" suffix. Is that actually standard?
I believe java.time also uses this syntax. I'm addition to Temporal.
It enables lossless round-trips of zoned datetimes. See: https://docs.rs/jiff/latest/jiff/_documentation/comparison/i...
Now that I'm back at my desk I had to check ISO8601, that suffix is not included. However it does look like an extension - RFC 9557 - which looks like is still in proposed state.
I would personally caution using these suffixes until wider adoption, because AFAIK the Olson database names themselves are not standardised on non-POSIX systems (i.e you might have a hard time on Windows).
The database itself may not be available but there are various implementations including Windows https://data.iana.org/time-zones/tz-link.html#software
https://learn.microsoft.com/en-gb/archive/blogs/bclteam/expl...