Gmail Snooze

Gmail Snooze is a Google Apps Script that adds the ability to "snooze" an email to Gmail. To snooze an email means to have an archived email reappear in the inbox after a set number of days. This is accomplished using special labels that the script sets up, and an Apps Script time trigger that moves emails between the labels around midnight in your local time. To "snooze" a thread, use Gmail’s “Move To” button to move the thread into the "Snooze for X days" label and archive it. Every night, threads will move up through one day of the queue, and at the appointed number of days they will reappear in your inbox. This is not an official Google product (experimental or otherwise), although the code is owned by Google.