Not all that weird. As pointed out, a one in 365 chance. It shouldn’t be a surprise but you’ll find many people having died within 3 days on either side of their birthday.
I have a database of baseball players, 7932 who have died out of 17,000. I would expect 22 to have died on their birthday. There’s actually 31.
Not surprising that more die on their birthday than statistically expected. My mother died on her birthday. She was hanging on to be able to share a glass of champagne one last time with her twin sister. She either saw or spoke on the phone to every family and friend that were dear her and by dinner time she had nothing left in the tank.
Interestingly, Yootha Joyce, who played Mildred Roper, gave up 47 points in 1980 (liver failure), but the three flatmates are still around, and Brian Murphy, who played George Roper, is currently at 9 points.