Lambda 时刻 UTC 时间设置小时和分钟

Question

When i run the following in a AWS lambda hosted in us-east-1

const currentTime = moment().utc().valueOf();
console.log(new Date( currentTime ));//1538003255995
Prints: Wed Sep 26 2018 19:07:35 GMT-0400 (Eastern Daylight Time) --- Correct in terms of current time.

const currentExecution = moment().set({
  hour: 19,
  minute: 24,
  second: 0
}).utc().valueOf();
console.log(new Date( currentTime ));//1537989840995
Prints:Wed Sep 26 2018 15:24:00 GMT-0400 (Eastern Daylight Time)

Why is it showing 15:24 instead of 19:24? But when i run this code in my local machine located in EST it prints Wed Sep 26 2018 19:24:00 GMT-0400 (Eastern Daylight Time)

Why is there a 4 hr difference when run in lambda alone?

Answer 1

Because new Date takes the local timestamp, so it returns the time at the place where you were when it was 19:07 at UTC, which is 15:07 . Thats different with AWS as they probably use no timezone offset, so the server behaves as if it was in UTC

You might want to use Date.UTC ... goto