Page.date(): just a number?!

I tried to get the page date within a twig file by using page.date and that returns me number: `1480266162. How can I transform that into a decent date format?

Note to myself: Look first!
http://twig.sensiolabs.org/doc/filters/date.html

Unix time is very handy as it's an integer rather than a DateType. Easier to parse and express than having to convert between uncertain formats (fuzzy-matching is hell).