one day, 24 hours / the daytime, the period from dawn until dusk / (figuratively) a short period of time / one day, someday, an unspecified day / the first day of the month

the basics, a general idea

(literally) one side / everywhere, all around, the whole area / one viewpoint, one opinion or way of thinking / the front page of a newspaper

unpredictable; no one knows what the future holds.

better safe than sorry, an ounce of prevention is worth a pound of cure

don't cry over spilt milk

a spork

Eggcorn of 一寸先は闇 (issun saki wa yami, “unpredictable”).

vicissitudes, the way that the world or a person prospers one day and declines the next

dotting the i's and crossing the t's