discussion of TimeZone handing in asp.net core‘s Server side rendered content

question:

1. how do we handle different timezone on the server (mvc/razor pages) and for multiple region site ?
2. how time be edit/update in en-us region ? (I’m in China, and only have 1 time, BeiJing Time +8)

background

today, when we using Angular/React/Vue to build a system, we can take advantage of the browser and client computer’s timezone. and Date is always local to us, so there are no problem for us to edit and read the time.

but what about a MVC site ? now MVC bind time default to UTC time (that make sqlserver store +0 time), and Mysql will store UTC time any way , and we do not know the client’s timezone on the server, so how we render the DateTimeOffset and DateTime ?

My opinion

1. we should have RequestTimezone concept， and a middleware to set and get, and InputTaghelper should use that.
2. A timezone map of country, there are only a few country have multiple timezone, (US , Russian,Canada, Australia )

explain 1 : we can use a small javascript to detect the timezone of browser and set a cookie , and RequestTimeZoneMiddleware read this cookie and set IRequestTimeZone.Current explain 2: direct get a timezone from culture and set it to IRequestTimeZone.Current only if the Current is null.

[icnocop]

For reference: https://github.com/vivet/Vivet.AspNetCore/tree/master/Vivet.AspNetCore.RequestTimeZone

[John0King]

@mkArtakMSFT any progresson this? and how you resolve the “date picker” and input-taghelper + “model binding” issue?