Please launch your browser and enter http://dlinkrouter.local or http://192.168.0.1 into the address bar. Then login and follow the steps below:
Step 1: Click on the Maintenance -> Time & Schedule

 
Step 2: Click Schedule:

 
Step 3: Click Add Rule:


Step 4: Create your Schedule and click Apply. The example below shows the scheduled time from 8:00-19:00.