>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. It makes sense to me that it is not

>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. It makes sense to me that it is not provided as it is something fundamentally different. ISO 8601 / RFC 3339 are just textual representations of specific[*] time moment (or interval), that could be easily converted to different definitions of time moments. OTOH, specifications like '2030-07-01 18:00 local time in London' are not a definition of a specific time moment, the are really a description of a condition, and we cannot resolve it to a specific time moment before it happens. So these are two fundamentally different concepts that does not make sense to put into one category. [*] If we ignore leap seconds