一日も早く

いちにちもはやく

as soon as possible, without further delay

一刻も早く

いっこくもはやく

immediately, as soon as possible, as quickly as possible

一日一日

いちにちいちにち

gradually, day by day

一足早い

ひとあしはやい

slightly early, just before

一日

いちにち いちじつ ひとひ ひとえ ついたち さくじつ いっぴ

first day of the month

早くも

はやくも

already, as early as

日一日と

ひいちにちと

day by day

一日二日

いちにちふつか

a day or two

早いもの順

はやいものじゅん

first-come-first-served basis

早いもので

はやいもので

already, time flies

一日一夜

いちにちいちや

all day and night

一日一善

いちにちいちぜん

doing a good deed each day, doing one good turn a day

一日一歩

いちにちいっぽ

one step each day

幾日も幾日も

いくにちもいくにちも

day after day, for many days

丸一日

まるいちにち

the whole day, all the day

一昨日

おととい おとつい いっさくじつ

day before yesterday

日本一

にほんいち にっぽんいち

Japan's best, number one in Japan

一両日

いちりょうじつ

(a) day or two

一七日

seventh day after a person's death; first seven-day period after a person's death