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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.

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11  
"Cheated out of a birthday party", perhaps? – MT_Head May 25 '11 at 4:31
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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
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Must be lovely. – Thursagen May 25 '11 at 5:05
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I know there's a term —how do you know that? – Dori May 25 '11 at 6:25
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Before answering this question, please see this meta question – nohat♦ May 26 '11 at 5:20
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3 Answers

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
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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
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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
up vote -1 down vote

Is the term Irish Twins what you were thinking of?

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I should say not. – Daniel δ Jan 28 '12 at 13:03
up vote -3 down vote

They are referred to as Scottish Twins.

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Please give a source for this - nothing I've found confirms this meaning of scottish twins. – Daniel δ Apr 11 '12 at 14:50

protected by RegDwighт♦ Apr 11 '12 at 14:25

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