Step 0- Login as "Admin"
Step 1- Go to the "Communication" section
Step 2- Click on the "Birthday" module
Step 3- Select "Month"
Step 4- Select "Student"
Step 5- Click on "Send SMS" button
Step 6- Again Click on "Send SMS" button
OR (If you want to send Notification)
Step 7- Click on "Send Notification" button
Step 8- Write the message in to the box
Step 9- Click on "Send Notification" button