I never knew there were Google/Gmail Apps scripts, but now I do, thanks to the new feature, Gmail Snooze.

Gmail Snooze is a feature that helps archiving emails and having them automatically reappear in the inbox at some specified time in the future. With Apps Script you can extend Gmail to add this functionality and a lot more yourself. 

Watch the video below to see how it works and if it sounds convincing enough to you then, you may try it out by following some simple instructions available at Gmail Snooze...