The phrase "appropriate time" refers to the right or suitable moment to do or say something. It implies waiting for the most fitting or opportune occasion. Full definition
It's okay to gently set limits at appropriate times in your child's development, just as you did with ending the nursing in public and nursing on demand several times per day. (hobomama.com)
There wasn't a more appropriate time for him to confess his feelings to her? (rottentomatoes.com)
For most animals, internal clocks help them perform recurring daily activities, like eat, sleep and hunt, at the most appropriate time of day. (sciencenews.org)