Date filter returns undefined for %B

[stewartknapman]

I'm using the date filter to output a date with the following format:

{{ current_article.date | date: '%d %B %Y' }}

However it is returning 15 undefined 2014. It looks like toLocaleDateString() is returning the date in the format dd/mm/yyyy rather than what was expected in the filters file i.e. Wednesday April 11 2012.

See: https://github.com/leizongmin/tinyliquid/blob/master/lib/filters.js#L209-L210

EDIT: it would seem that the format is dependant on the platform, locale and user's settings.
http://stackoverflow.com/a/8002651/1311767