一朝一夕[icchouisseki] in a day
一朝一夕に[icchouissekini] in a day
一夕[isseki] one evening
一夕話[issekiwa] (a) short story

朝夕[asayuu] morning and evening
夕間暮れ[yuumagure] evening twilight
夕闇[yuuyami] dusk
夕映え[yuubae] sunset glow

御誕生日おめでとうございます[otanjoubiomedetougozaimasu] Happy Birthday
また明日[mataashita] see you tomorrow
旭日[kyokujitsu] rising sun
旭日昇天[kyokujitsushouten] full of vigor and vitality (like the rising sun) (vigour)
或日[aruhi] one day (e.g. "one day while studying, ..")

一日の長[ichijitsunochou] superiority
一日一日[ichinichiichinichi] gradually
一日一夜[ichinichiichiya] all day and night
一日増しに[ichinichimashini] day by day
一日置き[ichinichioki] every other day

陰陽道[onmyoudou] Onmyoudou
紫陽花[ajisai] hydrangea (Hydrangea macrophylla)
斜陽[shayou] setting sun
重陽[chouyou] Chrysanthemum Festival (the 9th day of the 9th lunar month) (one of the five annual festivals)
太陽[taiyou] sun

太陽光線[taiyoukousen] sunlight
太陽光発電[taiyoukouhatsuden] solar power (generation)
太陽暦[taiyoureki] solar calendar
半陰陽[haninyou] hermaphrodite