Tvheadend

The time is rendered using the toLocaleString method, so it should render in your browser's preferred format.

http://www.w3schools.com/jsref/jsref_tolocalestring.asp

This covers the date (e.g. dd/mm/yyyy) and time (e.g. HH:MM:SS) elements. The day of the week is then inserted in front, so that would be wrong if your locale puts the day somewhere else, although it's not trivial to change it as JavaScript doesn't have a default way to include the day name from what I could see.