You received an email request that you want to respond to next week. For you to remember about this request, you need to have this email on top of your inbox next Monday at 9:30 AM. What should you do?

A. Click Snooze in the email options. Then select to snooze the email until 9:30 AM next Monday.

B. Mark the email as Important. Create a calendar event for 9:30 AM next Monday. Then add the email’s URL to the calendar event.
C. Add the email to Tasks. Then edit the task to have a due date of 9:30 AM next Monday.
D. Create a calendar event for 9:30 AM next Monday, and add an email notification to be sent to your inbox.

Reference: https://support.google.com/a/users/answer/9260550#2.6