let unix_timestamp = 1549312452;

// Create a new JavaScript Date object based on the timestamp
// multiplied by 1000 so that the argument is in milliseconds, not seconds
var date = new Date(unix_timestamp * 1000);

// Hours part from the timestamp
var hours = date.getHours();

// Minutes part from the timestamp
var minutes = "0" + date.getMinutes();

// Seconds part from the timestamp
var seconds = "0" + date.getSeconds();

// Will display time in 10:30:23 format
var formattedTime = hours + ':' + minutes.substr(-2) + ':' + seconds.substr(-2);

console.log(formattedTime);

For more information regarding the Date object, please refer to MDN or the ECMAScript 5 specification.

Split the string into its parts and provide them directly to the Date constructor:

Update:

var myDate = "26-02-2012";
myDate = myDate.split("-");
var newDate = new Date( myDate[2], myDate[1] - 1, myDate[0]);
console.log(newDate.getTime());

Updated: Also, you can use a regular expression to split the string, for example:

const dtStr = "26/02/2012";
const [d, m, y] = dtStr.split(/-|\//); // splits "26-02-2012" or "26/02/2012"
const date = new Date(y, m - 1, d);
console.log(date.getTime());

Since the .getTime() value is already in UTC, you can just divide by 1000, and round. · That is: · var apiDate = Math.round (new Date().getTime() / 1000); · works just fine. · apiDate is in "unix epoch time" and the API takes these values even if the API parameter is called a "Date". · But, if you want to truncate to the date only, just use: · var dateTime = new Date (); · dateTime.setUTCHours (0); · dateTime.setUTCMinutes (0); · dateTime.setUTCSeconds (0); · var apiDate = Math.round (dateTime.getTime() / 1000); · See, also "How do I parse the dates from the API?".