比较来自客户端浏览器和远程服务器的DateTime，C＃

Question

Here's the scenario

I have a ASP.NET MVC website that has a form that allows client to enter an expiry date (using JQuery datepicker), after the client submits the form I need to check from my server if the submitted date is before the current date.

The problem is that the form or the DateTime object does not include any field that indicates what timezone the user is in, hence I am struggling to convert it to the same timezone the server is in, then compare.

What is a recommend approach to solving this?

Answer 1

Hide a form element that contains the offset

<input type="hidden" value="" name="timezone" id="timezone" />

And set its value on page load

$(function () {
    $("#timezone").value(new Date().getTimezoneOffset());
});