Draft your Email.

Instead of clicking send, click on the small triangle beside it.

Click on the schedule, a pop up will show and now you can schedule date and time accordingly.

Click on "Pick Date & Time" and you can schedule your Email for any date and time.

Also, you can delete or edit the schedule draft, if you need to.

So you see it's so easy to set up an schedule email in gmail.

Let's see some of the benefits of Scheduling an Email in Gmail.