The Present Continuous is used :

      
● To talk about continuous activities :
           1)  at the time of speaking :   
                
- I am reading this page now.
           2)  around now,
in a more general sense :        
                
- I am learning English this year

       
To talk about planned future arrangements :
                 - Next month I am spending my holidays in Australia.   
                   I have already booked my flight.

                 - Our neighbours are coming to dinner tomorrow.  
                   They have accepted our invitation.