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Some days/dates are not present in all (Gregorian) calendar months. Specifically, five months of the year do not have a '31st', and February does not have a '29th' (except in Leap years) nor a '30th'.

Is there a generic term for these days/dates that are present only in selected months?

Example sentence:

If recurring event would fall on a [date-not-present-in-that/all-calendar-month(s)], its occurrence will fall on the last day of that month.

  • 1
    Hmm... Is there a name for those days in your language? I don't think there's a specific name for it... :-/ – Neeku Aug 15 '14 at 9:52
  • great question, but I believe there is no real term for this in English. Maybe "longer-month extra-days" would work in say a technical discussion. Don[t forget "31" is the only one you are really discussing. (February is a special case.) – Fattie Aug 15 '14 at 10:46
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    Days after 28th are in the fifth week of the month (or "after the end of the fourth week" if that's easier to visualise). Only a comment, because it's really too short for an answer. – Andrew Leach Aug 15 '14 at 17:46
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    In MS Outlook, if you enter a monthly recurring event for the X day of the month (X = 29, 30, or 31) you get a warning message "Some months have fewer than X days. For these months, the occurrence will fall on the last day of the month." – TrevorD Jun 14 '16 at 10:30
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    The term, if one were to find one, would almost certainly be from Latin, and would refer to the fact that the extra days were "stolen" from other months (particularly February) to glorify the specific deities and Roman emperors for whom the recipient months were named. – Hot Licks Jun 14 '16 at 11:50
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Hey I've thought of something I've seen in computer programming for these issues:

post28Days

ie, the days bigger than 28. you could also say "super-28 days" or similar.

I don't know if it's relevant to your situation.

  • Yeah, that's clever; I'm actually writing a software spec. :D – Czar Aug 16 '14 at 0:45
  • hope it helps, ciao ! – Fattie Aug 16 '14 at 13:25
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February 29 is called the "leap day" because it's not in every year. See http://en.wikipedia.org/wiki/February_29

That doesn't answer your question though. Sorry I don't have enough reputation points yet to just post a comment

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