Date Time/ ASP.NET/C3/MVC/

I will suggest a logic, you should make that as your concept and Business logic.

Always your server side application will give you the server Time.

Always the User System Client side code gives you browser time, where that will be the local time of user.

Use the Client side components like Jquery all to get the time zone of your user and convert that to your server time, time zone conversion.

Javascript:

var offset = new Date().getTimezoneOffset();

The time-zone offset is the difference, in minutes, between UTC and local time. Note that this means that the offset is positive if the local timezone is behind UTC and negative if it is ahead. For example, if your time zone is UTC+10 (Australian Eastern Standard Time), -600 will be returned. Daylight savings time prevents this value from being a constant even for a given locale.

Mark as answer, if helpful.