An girl celebrated her 12th birthday on December12, 2012, or 12/12/12.
Ruby Miles and her mother Julia, from Epsom, marked the occasion by going to see Twelfth Night in the West End.
Ruby said: 'It's amazing that I'm having my 12th birthday on the 12/12/12 and that it will be a thousand years until the next 12/12/12!'
Her mother said she was chosen by the Institute of Education as a millennium baby to represent her generation in a long term study.
But she said: "This is even more special. It’s very bizarre."
Ruby is in year 7 at Rosebery School for Girls in Epsom.
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