round the clock / all the time

neither fish nor fowl, up in the air

one for all, all for one

(literally) plan your day during the morning, plan your year during New Year's / early planning is the key to success

Clipping of 一千一夜物語 (Issen'ichiya Monogatari, “One Thousand and One Nights”).

thirty-first day of the month

twenty-first day of the month

short for 小倉百人一首 (Ogura Hyakunin Isshu): a famous "one hundred poems anthology", used as the basis of certain card games

an anthology of one hundred poems by one hundred poets, one poet for each poem

Synonym of 亜酸化窒素 (asanka chisso, “nitrous oxide”); dinitrogen monoxide