First off, please stop sending work emails on the weekends. Not only is this bad practice but you will receive an extremely low response rate. Let’s talk about what times of the day are best to send emails for high open and response rates. There is no one size fits all for this but data shows that there are some optimal times that people will open their emails. Of course, work emails sent between 9-5 have the best open rate but it should be noted that 47% of emails are opened outside of work hours on mobile devices.