Write now, send later with Schedule Send in Gmail
You can now schedule your emails in Gmail to be sent at a later date and time.
Just write your email as you normally would, then schedule it to be sent at a more appropriate date or time.
When drafting an original email or reply in Gmail, you’ll now see an arrow next to the “Send” button. Clicking this arrow now gives you the option “Schedule send” option. After clicking “Schedule send”, you can pick the specific date & time you’d like the message to be delivered.
Scheduled messages will appear in the “Scheduled” folder while queued to be sent.
Helpful link: Help Center: Schedule emails to send