Time is not parsing to UTC properly-CodePudding

I have the following Date brought from my database:

1970-01-01T15:52:00.000Z

I just want the time in UTC. So I use moment library to do it:

let time = '1970-01-01T15:52:00.000Z'
let _time = moment.utc(time).format("hh:mm")

Since moment alone converts time into local timestamp (which mine is -03:00), I have to use moment.utc() to keep the UTC time. But instead of returning the correct UTC time that is 15:52, it returns 03:52.

How can I solve this problem?

CodePudding user response：

I just want the time in UTC. So I use moment library to do it

There are built-in ways of getting UTC time without loading a library.

Use substring to return the parts of the time string you need:

let date = new Date("1970-01-01T15:52:00.000Z");

console.log( date.toUTCString().substring(17,22) );

console.log( date.toJSON().substring(11,16) );

console.log( date.toISOString().substring(11,16) );

CodePudding user response：

hh means hours on a 12-hour clock. Use HH instead.

let _time = moment.utc(time).format("HH:mm") // instead of .format("hh:mm")

Thanks, derpirscher, for the answer.