The card, which is 23cm wide and 15.5cm high, is available to buy from online retailer Firebox.com for £9.99. It looks just like an ordinary white greetings card and has 'Happy Birthday' written ...

This picture, posted to Reddit by a family member, shows a slightly worn birthday card with a list of signatures from two men, Ron and Jeff, dating back to 1973.

Dear Miss Manners: We are preparing to celebrate my daughter’s fourth birthday and are hosting her first party. We don’t expect any gifts. The invitation is extended for them to come celebrate ...