Noun A + といわず + Noun B + といわず + (statement about the whole category)
A and B are contrasting/complementary members of the same category (e.g. 昼/夜, 手/足, 平日/休日)
The grammar pattern といわず is used to express "whether it's A or B – everywhere / all of them / without distinction." It takes two representative items from the same category and implies that the statement applies not just to those two items but to everything in that category.
The structure is: A + といわず + B + といわず + (statement about the whole category)
A and B are typically contrasting or complementary members of the same group (e.g. weekdays and weekends, hands and feet, indoors and outdoors).
The nuance is stronger than simply listing two things with も…も. By using といわず, the speaker emphasizes that no distinction is made – the action or state applies universally across the entire category.
While をとわ問わず means "regardless of" and is used with a single noun (e.g. 性別を問わず "regardless of gender"), といわず specifically pairs two representative items to convey "not just A or B but everything."