Follow the below steps to Delay Send an email. You can write your email at any time and set the date and time you want it to be sent. 

Step 1) Write your email as normal - but do not click send

Step 2) Select "Options", and then "Delay Delivery" 

Step 3) Select the date and time you want your email to be sent from the drop down boxes

Step 4) Click "Close" 

Step 5) Send your email! The email will sit in your outbox until your selected delivery time.