Idioms and Phrases with save the day
save the day
Prevent a misfortune, as in They had forgotten the knife to cut the wedding cake, but Elizabeth arrived with one and saved the day.
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.