Gmail is updated from time to time and provides many features that are very useful to us. Snoozed is a feature of it, where you can schedule an email according to date and time when you want to send it. You can type mail any time and then schedule it according to need, and it will automatically send at that time. If you are unable to make snoozed email, then check your internet connection and confirm you set the correct date and time. If you still unable to do it, then contact Gmail by phone to fix it. yahoocustomer-service.com/gmail-customer-service.html