codegram/date_validator — pull request #49 by rathgar (2014-07-10 20:56:15+00:00)
Title: Allow dates to be formatted in error messages

Allow users to format the dates displayed in errors. Uses different format for each type. e.g.:
```yaml
en-GB:
formats:
date_validator:
date_time: '%d %b %I:%M %p'
time: '%I:%M %p'
```
Falls back to `:default` behaviour if no translation is found so will continue to format as it currently does.