How can I round time to hours and minutes instead of hours, minutes and seconds?

Question

My function returns the time like this 10:43:22 for example. How can I round the time to the closest minute so 10:43:22 becomes 10:43 and 10:43:44 becomes 10:44.

function time (){
    let date = new Date()
    let time = date.toLocaleTimeString("it-IT");
}

Does this answer your question? [Round a Date() to the nearest 5 minutes in javascript](https://stackoverflow.com/questions/10789384/round-a-date-to-the-nearest-5-minutes-in-javascript) it's for 5 minutes but you can easily change that — Cjmarkham, Apr 15 '21 at 15:21
you use a datetime formatter. Also, remember to ask yourself whether what you want makes sense. Just "not showing seconds" is almost _always_ fine because when it comes to time, it's not "10:44" until it's been more than "10:43:59". Time does not generally "round up". — Mike 'Pomax' Kamermans, Apr 15 '21 at 15:21

score 2 · Answer 1 · edited Apr 15 '21 at 16:03

2

I would get the milliseconds of that date and then round that value to minutes (1 minute = 60,000 milliseconds).

function createRoundedDate(date) {
  var ts = date.getTime();
  ts = Math.round(ts / 60000) * 60000;
  return new Date(ts);
}

console.log(createRoundedDate(new Date()))

edited Apr 15 '21 at 16:03

Cjmarkham

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answered Apr 15 '21 at 15:42

Iván Pérez

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Adding `.toLocaleTimeString("it-IT",{hour:'numeric',minute:'2-digit'})` would finish the job. :-) – RobG Apr 16 '21 at 01:22

score 0 · Answer 2 · answered Apr 15 '21 at 15:30

0

we can use the below code to create the new Date by removing the seconds part

var d = new Date()
var d1 = new Date(d.getYear(),d.getMonth(),d.getDate(),d.getHours(),d.getMinutes())
console.log(d1.toLocaleTimeString('it-IT'))

answered Apr 15 '21 at 15:30

Test12345

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This only removes the seconds, but does never round up? – frankenapps Apr 15 '21 at 15:33
1

It does not round. The correct answer in in the link from the first comment – Michael Rovinsky Apr 15 '21 at 15:36

score 0 · Answer 3 · answered Apr 15 '21 at 16:00

0

This should do it, and handle going over hours etc. (60,000 ticks is 1 min)

function time(){
  let date = new Date()
  let dateMins = new Date(date.getYear(),date.getMonth(),date.getDay(),date.getHours(),date.getMinutes())
  let roundedDate = new Date(dateMins.getTime() + date.getSeconds() > 30 ? 60000 : 0 )
  let time = roundedDate.toLocaleTimeString("it-IT");
}

answered Apr 15 '21 at 16:00

Alexander Don'valderath

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By "ticks" you mean milliseconds yes? – Cjmarkham Apr 15 '21 at 16:04

How can I round time to hours and minutes instead of hours, minutes and seconds?

3 Answers3