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The Japanese word

十四日

is pronounced
juuyokka | じゅうよっか
means
14th {of the month}
Examples:
この年の正月は十四日から十七日まで四日間の雪を見た。
kono toshi no shōgatsu wa jū yon nichi kara jū nana nichi made yon nichikan no yuki o mi ta.
In the first month of that year, I saw that it snowed for four days from the 14th until the 17th. | In January of that year, we saw snow for four days, from the fourteenth to the seventeenth.
二月十四日に、アメリカ人はバレンタイン・デーのお祝いをする。
nigatsu jū yon nichi ni, amerika jin wa barentain . dē no oiwai o suru.
On February 14th, Americans celebrate Valentine's Day.
Examples sourced from tatoeba.org