In the Admin Dashboard, navigate to the Staff tab. Click on the staff member's name for whom you'd like to add a day. In the Signing History section, click the blue "Add day" button on the right side.
The Add staff hours window will pop up where you can enter the date and times that the staff member clocked in and out. You can also click "+Add another break" to record break times. The bottom of this window will summarize the staff member's hours for the day. Click "Save" once completed and this day will be added to their Signing History.