time' of day'
1. a definite time as shown by a timepiece; the hour: Can you tell me the time of day?
2. Informal.a minimum of attention: He wouldn't even give her the time of day.
3. the current time; the present: The younger generation in this time of day encounters problems quite different from those of past generations.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.