How to set date always to eastern time regardless of user‘s time zone

题意：如何将日期始终设置为东部时间，而不管用户的时区如何

问题背景：

I have a date given to me by a server in unix time: 1458619200000

我从服务器获取到一个以 Unix 时间表示的日期：1458619200000

NOTE: the other questions you have marked as "duplicate" don't show how to get there from UNIX TIME. I am looking for a specific example in javascript.

注意：你标记为“重复”的其他问题没有展示如何从 UNIX 时间转换。我在寻找一个 JavaScript 中的具体示例

However, I find that depending on my timezone I'll have two different results:

然而，我发现根据我的时区，我会得到两个不同的结果

d = new Date(1458619200000)
Mon Mar 21 2016 21:00:00 GMT-0700 (Pacific Daylight Time)

// Now I set my computer to Eastern Time and I get a different result.

现在我将计算机设置为东部时间，结果不同

d = new Date(1458619200000)
Tue Mar 22 2016 00:00:00 GMT-0400 (Eastern Daylight Time)

So how can I show the date: 1458619200000 ... to always be in eastern time (Mar 22) regardless of my computer's time zone?

那么，如何将日期 1458619200000 显示为始终处于东部时间（3月22日），而不受我计算机时区的影响呢

问题解决：

You can easily take care of the timezone offset by using the getTimezoneOffset() function in Javascript. For example,

你可以通过使用 JavaScript 中的 getTimezoneOffset() 函数轻松处理时区偏移。例如

var dt = new Date(1458619200000);
console.log(dt); // Gives Tue Mar 22 2016 09:30:00 GMT+0530 (IST)

dt.setTime(dt.getTime()+dt.getTimezoneOffset()*60*1000);
console.log(dt); // Gives Tue Mar 22 2016 04:00:00 GMT+0530 (IST)

var offset = -300; //Timezone offset for EST in minutes.
var estDate = new Date(dt.getTime() + offset*60*1000);
console.log(estDate); //Gives Mon Mar 21 2016 23:00:00 GMT+0530 (IST)

Though, the locale string represented at the back will not change. The source of this answer is in this post. Hope this helps!

不过，后端表示的区域字符串不会改变。这个答案的来源在于此帖。希望这能帮到你