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I wonder if both prounciations of 十三日 are accepted?

  * じゅうさんにち
  * じゅうみっか

The reasons I am asking are these:

  1. Windows IME seems to accept it
  2. 十四日 is pronouncecd as じゅうよっか, matching the pronunciation of 四日, which is よっか, but my textbook says 十三日 should be pronounced as じゅうさんにち

At the same time, both Google Translate and my dictionary (Weblio) gives only
the first pronunciation (じゅうさんにち).

  1. [Google Translate](https://translate.google.com/?sl=ja&tl=en&text=%E5%8D%81%E4%B8%89%E6%97%A5%0A&op=translate)
  2. [Weblio](https://www.weblio.jp/content/%E5%8D%81%E4%B8%89%E6%97%A5)
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2021-01-13T11:20:17.100
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question
pronunciation readings numbers
Can I pronounce　十三日 as じゅうみっか?
> Can I pronounce 十三日 as じゅうみっか?

_Can_ you? Yes. You could also pronounce it as _wagawaga boom tash_ , or as
_fweeeEEEEEE gobble gobble_. However, none of these are likely to be
understood by Japanese speakers to mean "the thirteenth day of the month".

> Windows IME seems to accept it

The Windows IME is probably parsing this as じゅう + みっか, not as じゅうみっか as a
single term.

In fact, typing this here just now, I see that the IME has zero kanji
conversion candidates for the whole kana string じゅうみっか -- only for the pieces
of it, with じゅう as one sub-string and みっか as the other. If I instead enter the
kana string じゅうさんにち, I do indeed see 十三日 as a conversion candidate for the
entire kana string, not just a part of it.

> 十四日 is pronounced as じゅうよっか, matching the pronunciation of 四日, which is よっか

一日 is another irregular reading for dates, ついたち and never いちにち. Other dates up
through "the tenth" use the native Japanese-derived readings. 二十日 for dates is
also native-derived, and is read as はつか, never にじゅうにち.

All of the "fours" in dates are strange for some reason, related to obscure
details of historical development. This holds true for 四日 (only よっか, never
よんにち or しにち), 十四日 (only じゅうよっか, never じゅうよんいち or じゅうしにち), and 二十四日 (only
にじゅうよっか, never にじゅうよんにち or にじゅうしにち).

Otherwise, other dates from "the eleventh" through to "the thirty-first" are
read with the expected 音読【おんよ】み: 十一日【じゅういちにち】、二十五日【にじゅうごにち】、三十一日【さんじゅういちにち】.
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2021-01-13T22:24:36.987
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answer
No, it is only pronounced as じゅうさんにち
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answer