Dealing with timezones in a web application can be tricky, especially when the server and client are located in different locations like the US and India. I have a datetime picker that I need to validate on the server to ensure that the dates match up correctly. However, the issue arises because of the differing timezones between the client and server. How can I effectively address this timezone-related datetime problem in my application?
To ensure consistency with time zones, it is recommended to convert time to UTC in the browser and handle everything in UTC (except for displaying to users). Send dates to the server in full ISO8601 format so that when parsed by the server, it can be converted to its local timezone:
// Ensure myDateTimeValue is a Date object in JavaScript
var utcDateTimeAsString = myDateTimeValue.toISOString();
You can either store this value in a hidden field to send to the server during a regular postback or include it as part of your AJAX request.
On the server side, parsing such strings will result in a valid local date corresponding to the same absolute time:
// Example C# parsing of JavaScript's (new Date()).toISOString() result
DateTime localTime = DateTime.Parse("2016-02-01T06:38:05.609Z");
If you choose to handle time zones manually, here are some helpful links:
Adjust the server's DateTime setting to align with India Time Zone instead of US.
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