Time Zones: UTC offset vs. named time zones

[Namoshek]

Currently, the time zone of an EVSE can be given in the address object in form of a UTC offset, e.g. UTC+02:00. Especially in Central Europe, where most countries are using a different UTC offset for summer time, this comes with the drawback that published data becomes inaccurate the moment we change our clocks.

I therefore suggest switching to named time zones as they can be found in the list of tz database time zones which is published by IANA.

Such an API change could in theory be (mostly) backwards and forwards compatible, since for most countries there is only one timezone and a simple mapping from country to time zone and vice versa is already sufficient.

[erkkiat]

Please advise how we can ensure that a driver knows if a location is open or closed, if summer/winter time is not considered. @mhassan-hubject