In the YAML header, for the date field, you should really consider using, by default, a standard format, such as: YYYY-MM-DD hh:mm:ss
The format I proposed above was inspired by the ISO 8601 standard: http://en.wikipedia.org/wiki/ISO_8601
The current format "MM/DD/YYYY" makes no sense to, e.g., many European countries where, when "/" are specified, have this format: DD/MM/YYYY.