To return the "time" portion of the Date as a string, using the current locale's conventions, use the toLocaleTimeString() method.
The toLocaleTimeString method relies on the underlying operating system in formatting dates. It converts the date to a string using the formatting convention of the operating system where the script is running. For example, in the United States, the month appears before the date (04/15/98), whereas in Germany, the date appears before the month (15.04.98).
Example
You can try to run the following code to return the “time” portion of the Date as a string −
<html> <head> <title>JavaScript toLocaleTimeString Method</title> </head> <body> <script> var dt = new Date(2018, 0, 15, 14, 16, 30); document.write( "Formated Date - Time : " + dt.toLocaleTimeString() ); </script> </body> </html>