Manchester United Son Birthday Card.Celebrate your son's birthday with this exclusive Manchester United Dad Birthday card. This special Son Birthday Card is designed with the official Manchester United Crest and the message on this card reads" Happy Birthday Son. Have a Glorious Birthday!" There is lots of space to write your own personal message as well.Danilo is the leading publisher of officially licensed calendars, diaries, greeting cards, gift wrap and gift bags in the UK. We are a family run company that’s been operating for more than 40 years. Our licenses range from baby to adult. All the paper we use is responsibly sourced and we only work with suppliers and manufacturers that meet our stringent ethical requirements.