1 a single day apart seems like three seasons (idiom)
一日不见，如隔三秋
yī rì bù jiàn , rú gé sān qiū
1 one day apart seems like three years (idiom)
一日之计在于晨
yī rì zhī jì zài yú chén
1 make your day's plan early in the morning (idiom)
2 early morning is the golden time of the day
一日之雅
yī rì zhī yǎ
1 lit. friends for a day (idiom)
2 fig. casual acquaintance
一日千里
yī rì qiān lǐ
1 lit. one day, a thousand miles (idiom); rapid progress
一日为师，终身为父
yī rì wéi shī , zhōng shēn wéi fù
1 lit. teacher for one day, father for ever (idiom)
不可同日而语
bù kě tóng rì ér yǔ
1 lit. mustn't speak of two things on the same day (idiom); not to be mentioned in the same breath
2 incomparable
不见天日
bù jiàn tiān rì
1 all black, no daylight (idiom); a world without justice
世风日下
shì fēng rì xià
1 public morals are degenerating with each passing day (idiom)
今日事今日毕
jīn rì shì jīn rì bì
1 never put off until tomorrow what you can do today (idiom)
来日方长
lái rì fāng cháng
1 the future is long (idiom); there will be ample time for that later
2 We'll cross that bridge when we get there
偷天换日
tōu tiān huàn rì
1 to engage in fraudulent activities (idiom)
2 skulduggery
3 to hoodwink people
4 to cheat sb audaciously
光天化日
guāng tiān huà rì
1 the full light of day (idiom)
2 fig. peace and prosperity
3 in broad daylight
冰冻三尺，非一日之寒
bīng dòng sān chǐ , fēi yī rì zhī hán
1 three feet of ice does not form in a single day (idiom); Rome wasn't built in a day
同日而语
tóng rì ér yǔ
1 lit. to speak of two things on the same day (idiom); to mention things on equal terms (often with negatives: you can't mention X at the same time as Y)
在家千日好，出门一时难
zài jiā qiān rì hǎo , chū mén yī shí nán
1 lit. at home, one can spend a thousand days in comfort, but spending a day away from home can be challenging (idiom)
2 fig. there's no place like home
夏虫不可以语冰
xià chóng bù kě yǐ yǔ bīng
1 a summer insect cannot discuss ice (idiom)
夜以继日
yè yǐ jì rì
1 night and day (idiom); continuous strenuous effort
天长日久
tiān cháng rì jiǔ
1 after a long time (idiom)
如日中天
rú rì zhōng tiān
1 lit. like the sun at noon (idiom)
2 fig. to be at the peak of one's power, career etc