the appropriate time or past the appropriate time:
It's high time he got out of bed.
Examples from the web for high time
It is now high time that these principles are applied to the design and building of our human future in space.
It's high time that humans expanded their horizons and explored the solar system.
It's high time for an era of research that takes the extra step so that drugs can be better matched to individuals.
It was high time to upgrade to a later release anyway.
It is high time to give this the means it deserves, in terms of staff and regulatory power.
British Dictionary definitions for high time
high time
adverb
1.
the latest possible time; a time that is almost too late: it's high time you mended this shelf
noun
2.
Also called high old time. an enjoyable and exciting time
Idioms and Phrases with high time
high time
The appropriate time for something; also, past the appropriate time. For example, It's high time we did something about Martha's dog, or It's high time you children were in bed. The precise meaning of this term depends on the tone of voice and/or the context. For a synonym, see about time