RFC 3339 vs. ISO 8601
I find it weird that there's no way to specify a future date/time with respect to a specific timezone, e.g. Europe/London.<p>I don't think it's unreasonable to want to be able to specify a meeting in London, on July 1st 2030, at 6pm local time - no matter what happens to UK timezones between now and then.<p>The UK currently uses Z+00:00 from November to March, and daylight savings of Z+01:00 from April to October (roughly)[0]. But it's possible that between now and 2030 they might adopt Central European (Summer) Time[1], or retry British Double Summer Time[2], or scrap daylight savings entirely. Therefore, what happens to 6pm with respect to any given epoch might vary wildly between now and 2030.<p>But it would be nice to set a calendar event for "6pm London time", whatever London time happens to be when the event rolls around. But there's no standardised interoperable way to say "2030-07-01 18:00:00 Europe/London".<p>[0] <a href="https://en.wikipedia.org/wiki/British_Summer_Time" rel="nofollow noreferrer">https://en.wikipedia.org/wiki/British_Summer_Time</a><p>[1] <a href="https://en.wikipedia.org/wiki/Central_European_Time" rel="nofollow noreferrer">https://en.wikipedia.org/wiki/Central_European_Time</a><p>[2] <a href="https://en.wikipedia.org/wiki/British_Summer_Time#Periods_of_deviation" rel="nofollow noreferrer">https://en.wikipedia.org/wiki/British_Summer_Time#Periods_of...</a>