Eli5 – Why is Christmas Day and New Year’s Day the rarest birthdays?

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Do people just hold off going to the hospital on those days?

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Anonymous 0 Comments

A portion of babies will be born when they are born, except for the fact that there are seasonal highs and lows with conception and birth, these days are “random” over a given time span.

A portion of births are scheduled in advance within a window. This can be for any number of reasons – a c-section, an inducement, etc. If this is the case, then unless there’s an emergency, doctors aren’t too keen to schedule one on Christmas or New Years. These are also holidays across multiple parts of the world not just in one country. Many other holidays, even if doctors typically don’t schedule for them, are often rotating holidays on a calendar (such as Lunar New Year or Eid al-Fitr), don’t affect many countries (such as Fourth of July or Bastille Day) or both (Thanksgiving, Passover). So on a given iteration of a holiday there may be a below average number of births, but they won’t affect the actual calendar day for birthdays in the same way.

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