I would like to know if there is a word for this birthday event:
when the chronological age matches the day of the same month - becoming 29 on the 29th of May.
Thank you,

Gene

anniversial coincidence

Welcome Gene. I doubt if it has a word of it's own but I like coincidences like that.

As this can happen only once in a lifetime it's worth a good celebration.

And sometimes not at all (and I'm not talking about early death).

Are you suggesting that there are not likely to be many people who make 116 orbits of the Sun?

You mean the Febuary leap day thing? Born on Feb. 29 and becoming 29 just when there is no 29? Could happen, how sad.

no, everyone only has one day in their life that this will hold true.

That's what I thought too at first. Everyone gets one birthday sort of juxtaposition up to when we get 32. But you only get 29 once and when you are born on Feb. 29 and by coincidence it is the year without the 29th Feb. in it, you missed your chance forever and always. No?

If one was born on 2/29/2008 -
2037 has no Feb. 29th.
So if you lived only 115 yrs. - no

But if you made it to 2/29/2124, Yes!
You might want to have a very very very good celebration.

I was born on the 15th - I'm all set.

what I was thinking of: I was born on the 4th of January, so only once would I be four on the 4th.

isn't that what the OP is talking about?

I won't be five on the 5th, because I wasn't born on the 5th; it has no meaning.

as for a word for it, hmm. I like tsuwm's idea.

and welcome, Gene!!

No coincidence about it. It can't happen. Feb 29 comes every four years (with some exceptions, but those exceptions don't add Feb 29ths, they skip them) so they only come on years when your age is a multiple of 4 which 29 isn't.

Concievably, if you lived to 116 and were born on a Feb 29th you may consider yourself 29. However, most leapers celebrate on either the 28th or 1st of March.

[Off topic Olly, my five odd plants of New Zealand spinage are getting on very well and I was surprised to see (link) that it's
a beach growing wild plant originally.
tetragonia ]

On topic: Until you can count to four being born on the 1,2,3, or 4th will be lost as a specialty.

Owlbow, you must be a calculater miracle.

Looks good. I've never tried it but I'll now keep my eyes peeled next time I'm at the beach.