Different ways to Convert Unix Timestamp into date and time in javascript

Unix timestamp is a long number, the number of milliseconds since 1970-01-01 UTC.

console.log(Date.now()); //1641894862442

It is a long number, called UNIX timestamp, and an example is 1641895275360

How do you convert this number to date and time format in JavaScript?

The output Date format is MM/DD/YYYY and the time format is HH:MM:SS.

There are multiple ways we can convert Unix timestamps.

#Use the toLocaleDateString method to convert timestamp to Date

First, create a Date object with a Unix timestamp in milliseconds, and call toLocaleDateString by passing local(en-US), converted to default date format(MM/DD/YYYY).

timestamp = 1641895275360;
var todayDate = new Date(timestamp).toLocaleDateString("en-US");
console.log(todayDate);

Output:

1/11/2022;

#Use the toLocaleTimeString method to convert timestamp to time

The toLocaleTimeString() method takes local, and converts to time format(HH:MM:SS).

timestamp = 1641895275360;
var todayTime = new Date(timestamp).toLocaleTimeString("en-US");
console.log(todayTime);

Output:

10:01:15 AM

#momentJS to convert Current timestamp to Date and time

momentJS is a javascript library that provides utility functions to manipulate date and time-related data. format() method takes string format, converts it to date and time

var timestamp = moment.unix(1341895271360);
console.log(timestamp.format("MM-DD-YYYY hh:mm:ss"));

Output:

"11:59:20"

Another example is, format method takes “L” as the format

const date = moment(1341895271360).format("L");
console.log(date); // 4/17/2020

Output:

"07/10/2012"

#Use inbuilt Date functions

This is a way of manually getting the Date and time For retrieving the Date related information, call the getFullYear(),getMonth(), and getDate() methods from the Date object. getHours(),getMinutes(), getSeconds() method uses to get the time.

Here is an example.

function getDate(timestamp) {
  var date = new Date(timestamp);
  var year = date.getFullYear();
  var month = ("0" + (date.getMonth() + 1)).substr(-2);
  var day = ("0" + date.getDate()).substr(-2);

  return year + "-" + month + "-" + day;
}
function getTime(timestamp) {
  var date = new Date(timestamp);

  var hour = ("0" + date.getHours()).substr(-2);
  var minutes = ("0" + date.getMinutes()).substr(-2);
  var seconds = ("0" + date.getSeconds()).substr(-2);

  return hour + ":" + minutes + ":" + seconds;
}
console.log(getDate(1641895271360));
console.log(getTime(1641895271360));

Output:

"2022-01-11"
"15:31:11"

#Conclusion

Learned multiple ways to convert timestamp or epoch time to Date and time

• toLocaleDateString and toLocaleTimeString
• momentJS
• Inbuilt Date functions