You can send a fax at a specified time. Only monochrome faxes can be sent using this feature.
You can find the menu on the printer's control panel.
Fax > Fax Settings > Send Fax Later
Enable Send Fax Later, and then specify the time of day to send the fax.
To cancel the fax while the printer is waiting for the specified time to arrive, cancel it from Job/Status on the home screen.