五十日

Compound of 五 (ご) (go, “five”) + 十 (とお) (tō, “ten”) + 日 (ひ) (hi, “day”).

The hi changes to bi as an instance of rendaku (連濁).

• Jūbakoyomi
  • (Tokyo) ごと​おび [gòtóꜜòbì] (Nakadaka – [2])[1]
  • IPA^(key): [ɡo̞to̞ːbʲi]

五十日 (hiragana ごとおび, rōmaji gotōbi, historical hiragana ごとをび)

1. the days of a month that are multiples of 5 or 10 (as financial transactions in Japan are most frequent on these days, institutions and roads are usually crowded):
   1. 五日 (itsuka, go-nichi, “fifth (5th) day”)
   2. 十日 (tōka, jū-nichi, “tenth (10th) day”)
   3. 十五日 (jūgo-nichi, “fifteenth (15th) day”)
   4. 二十日 (hatsuka, nijū-nichi, “twentieth (20th) day”)
   5. 二十五日 (nijūgo-nichi, “twenty-fifth (25th) day”)
   6. 三十日 (misoka, sanjū-nichi, “thirtieth (30th) day”)

Compound of 五十 (い) (i, “fifty”, combining form) + 日 (か) (ka, “day”).

五十日 (hiragana いか, rōmaji ika)

1. fifty days
   • c. 1028-1107, Eiga monogatari (volume 1, page 32)[2]

     はかなう御 (み)五十 (い)日 (か)なども過 (す)ぎもていきて、生 (う)まれ捨 (す)て三 (みっ)月 (か)といふに、七月 (しちがつ)廿 (にじゅう)三 (さん)日 (にち)に東 (とう)宮 (ぐう)にたゝせ給 (たまへ)ぬ。

     hakanau mi-ika nado mo sugitemoteikite, umare sute mikka to iu ni, shichi-gatsu nijūsan ni dōgū ni tatase tamaenu.

     (please add an English translation of this example)

   • c. 1080s, Sagoromo monogatari (volume 2, page 182)[3]

     まことに、かの若宮 (わかみや)の御 (み)五十 (い)日 (か)にもなりぬれば、かゝる程 (ほど)も、「いかでかは」とて、内裏 (だいり)より、よろづに扱 (あつか)はせ給 (たまひ)けり。

     makoto ni, ka no wakamiya no mi-ika ni mo narinureba, kakaru hodo mo, “Ikade-kawa” tote, dairi yori, yorozu ni atsukawase-tamaikeri.

     (please add an English translation of this example)

2. Short for 五十日の祝 (ika no iwai): a Heian-period celebration on the 50th day after a child's birth
3. Short for 五十日の餅 (ika no mochii): mochi fed to the child during ika no iwai

• 五十 (い)日 (か)の祝 (いわい) (ika no iwai)
• 五十 (い)日 (か)の餅 (もちい) (ika no mochii)