► 名詞日日  [ひにち]    
meaning:  date  rank: 2☆ 
宴会の日日は
未だ決まっていない ⇨ The date of the party has not been set yet
More examples:- 日日を遅らせたらどうでしょう? ⇨ How about moving the date back?
 - 日日は早ければ早い程良い ⇨ For the date, the earlier the better
 - 彼女は毎日日記を付ける ⇨ She leaves notes in her diary every day. She keeps a diary