Today is still RDJ's birthday - in Burgerland time, at least. It is also the birthday of colleague and collaborator Tom Middleton, who was born on the exact same day.
https://en.wikipedia.org/wiki/Tom_Middleton
James and Middleton - both born on August 18, 1971 - collaborated on a track (the third one) on James' very first professional release, /Analogue Bubblebath/ (as AFX and Schizophrenia, respectively). An auspicious set of facts.
https://en.wikipedia.org/wiki/Tom_Middleton
James has another "Twin", of course - his brother Richard James (less the D.), who died in infancy, and whose grave is pictured on the girl/boy EP. I take the single date to mean that the infant was both born and died on the same day.
link for the track/release, whoops:
https://www.youtube.com/watch?v=Cyo61Q69xtI