leave for another occasion
leave (something) for another time/day/week/etc.
To reserve or save something for some future point or event. I'm sorry we didn't get a chance to do the hang-gliding—I guess we'll just have to leave it for another day. Don't throw those decorations out! We can leave them for another occasion down the line!
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
leave something for another occasionand keep something for another occasion
to hold something back for later. (Occasion can be replaced with time, day, person, etc.) Please leave some cake for another day. Don't eat all the cheese. Leave some for another occasion. I have to leave some of my earnings for next month.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.