With Email Studio for Gmail, you can easily schedule emails right inside Gmail and the add-on will send them later at the specified date and time automatically.
Download Email Studio from https://emailstudio.pro
You can create one-time schedules that are delivered once or recurring schedules that go out multiple times on different dates. For instance, you can reminder your team to fill the timesheet every Friday or send a email on the last weekday of the month to your tenant reminding them of the due rent.