English Language & Usage Stack Exchange is a question and answer site for linguists, etymologists, and serious English language enthusiasts. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

What is the term for two siblings born on the same calendar day, one or more years apart? I know there's a term, and I'd know it if I saw it, but I can't for the life of me remember it.

share|improve this question
"Cheated out of a birthday party", perhaps? – MT_Head May 25 '11 at 4:31
Man, you're tellin' me. My sister and I share a birthday, two years apart, meaning we shared presents and birthday parties all my life. – Jimmy Sawczuk May 25 '11 at 4:32
Must be lovely. – Thursagen May 25 '11 at 5:05
I know there's a term —how do you know that? – Dori May 25 '11 at 6:25
Before answering this question, please see this meta question – nohat May 26 '11 at 5:20
up vote 8 down vote accepted

Aside from saying that you "share a birthday", I am not sure that such a term exists. If it does it isn't likely to be very well known. Restricting it to only match siblings is likely to make things less likely to match up perfectly.

Generally, special birthdays are given a modifier. Most of these are just off the cuff:

  • holiday birthday
  • shared birthday
  • golden birthday
  • half-birthday

Other words that could work apart from "shared":

  • joint birthday
  • combined birthday

You could also go the other way with it and accentuate the negative:

  • split birthday
share|improve this answer
I guess the Internet has spoken, whatever word I heard of for this was made up. Thanks! – Jimmy Sawczuk May 26 '11 at 17:16
Discussion on meta notwithstanding, all words were at one time "made up". If this is not the place to do so, that doesn't mean you shouldn't feel free elsewhere. – mickeyf Feb 15 '12 at 0:52

protected by RegDwigнt Apr 11 '12 at 14:25

Thank you for your interest in this question. Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site (the association bonus does not count).

Would you like to answer one of these unanswered questions instead?

Not the answer you're looking for? Browse other questions tagged or ask your own question.