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7th day of the month
seven days
七なな日にちに届くとどくはずです。
It should arrive on the 7th.
一いち月がつ七しち日にちは七草ななくさがゆを食べるたべる日ひだ。
January 7th is the day to eat seven-herb porridge.
七なな日かまで待っまってもらえますか。
Could you wait until the 7th?