When you put your Mac to sleep, naturally you will also want a way to wake it up at a later time. Click on the Options tab then select the “Wake for Ethernet network administrator access” option, this applies to Macs connected to a network with Ethernet settings.
You can schedule your Mac to wake or start up (when switched off) at a set time. Click on the Schedule… button at bottom-right corner of the window, a small dialog box will open. Check off the Start up or wake check box and enter the time in the text box when you want to wake your Mac. Next, click on the drop-down menu at left of the time text box to select the days of the week for starting or waking the Mac.