Dateformat

Hi. I'm having a problem understanding the dateformat both short and long. I can't see anywhere in the docs what any of these mean:
F jS \a g:ia
Currently my dates are in US format and I need UK.
Thanks

Internally Grav just uses the PHP date functions so the formats are defined in standard format:

http://php.net/manual/en/function.date.php

The exact format is up to you but probably along the lines of d-m-Y

Thanks.