Get current timestamp from specific timezone

问题:

is there an easy way to get the unix timestamp in javascript from a specific timezone? for example i want the client send me an unix timestamp but i want to get it to match my timezone.

thanks!

回答1:

Why not simply send the date in UTC, and then convert to your timezone on the server?

var utcEpochSeconds = dateObj.getTime() + (dateObj.getTimezoneOffset() * 60000);

回答2:

Use toISOString to get a UTC timestamp.

var date = new Date();
date.toISOString(); // EST would be 6 hour diff from GMT

回答3:

In order for this to happen, you need to apply the timezone offset to the time, and then remove your offset from value (test this, I am guessing from memory):

var now = new Date(),
    offset = -(now.getTimezoneOffset() * 60 * 1000), // now in milliseconds
    userUnixStamp = +now + offset;

Now offset from your own:

var now = new Date(),
    offset = now.getTimezoneOffset() * 60 * 1000,
    yourUnixStamp = userUnixStamp - offset;