'time of day'에 개해 옥스퍼드 사전이 제시한 의미들입니다. 한데 모아져 있는 것은 아닙니다.

1) hour of the clock, period of the world's history, etc 시계의 시간, 세상사의 시간

2) 낮 시간 :  A point or fixed part of the year, a season, as in time of year; in comb. in spring-time, summer-time, autumn-time, winter-time; also term-time, vacation-time, holiday-time, etc.; also, of a day, as time of day, time of night, day-time, night-time, morning-time, evening-time; also dinner-time, bed-time, etc

3)

a) 위 1)과 통함. a. The hour or exact time as shown by the clock; hence, a point or stage in any course or period (somewhat colloq.). 

b) 인사말에서 :  good, fair time of day (obs.); also, to give one, or pass, the time of day (now dial. and colloq.), to greet, salute, exchange salutations: see also PASS v. 52c. not to give (a person) the time of day (colloq.), not to help or cooperate with (a person) at all, to be surly or mean towards.