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

pot calling the kettle black; six of one, half a dozen of the other

a bird in the hand is worth two in the bush

Kyūjitai form of 大二十面半十二面体: great icosihemidodecahedron

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

thirty-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

polyandry (plurality of husbands at the same time)