Site: USPSget an error message about date format and also that I can't ship more than 3 days ahead. I used the site's drop down menu. Add new comment Comments Tracking Number Error - Invalid value specified for LabelDate. If specified, LabelDate must be formated as mm/dd/yyyy or dd-mmm-yyyy and be within the next 3 days. reply Add new comment Your name * E-mail * The content of this field is kept private and will not be shown publicly. Comment * Notify me when new comments are posted MeUd58 Enter the code above * Enter the code without spaces.