code: function yyyymmdd (d, delim) {
                      if(!(d instanceof Date)) return d;
                      delim = typeof delim !== 'string' ? '-' : delim ;
  
                      var dd   = d.getDate(),
                          mm   = d.getMonth() + 1,
                          yyyy = d.getFullYear();
  
                      if(dd < 10) dd = '0' + dd;
                      if(mm < 10) mm = '0' + mm;
                      return yyyy + delim + mm + delim + dd;
                  }
docs: Returns the date in the yyyy-mm-dd format.
  @param {Date} The date object to operate on.
  @param {String} [delim='-'] The delimiter to used the separate the date components (e.g. '-' or '.')
  @returns {String} The date in the yyyy-mm-dd format.
  @function