laravel/framework — pull request #158 by alexwhitman (2013-01-25 15:07:31+00:00)
Title: Add date and date format validation rules

Adds `date` and `date_format:format` validation rules. The date format string is tested against the string formatting options of http://php.net/manual/en/datetime.createfromformat.php

The following can be used as validation messages:
```php
"date" => "The :attribute is not a valid date.",
"date_format" => "The :attribute does not match the format :format.",
```

Tests also included.

I'm happy to update the docs if this is merged.