Timezones & Daylight saving - Javascript

[ramkum]

Hi,

I have a system that allows ppl to set up and join online meetings. Currently, I just ask the guy organizing a meeting to submit his timezone and whether its in DST or not on the date of the meeting, and just show that to everyone along with the date and time of the meeting.

What I would ideally like to do, is show everyone the date and time of every meeting in THEIR timezone. I think I've pretty much figured out how to use Javascript to find out the timezone offset for a user and show him the right time. What I cant yet figure out, is to determine, given a future date for a meeting, whether that future date will have DST adjustments or not for the user's timezone.

Is there any simple way to do this, apart from hardcoding all the DST rules for all the geographies in the world into my code?

Thanks!
Ram

[ramkum]

I forgot to mention, I use ASP, not ASP.NET

[acoder]

When using the Date object in JavaScript, the local DST settings are already applied, so it shouldn't be a problem with the offset.