How do I change the Android calendar on my main page to my Google calendar?

[AC Question]

I updated my Samsung Galaxy 5 & now my default calendar is the Android calendar & I want my Google calendar to be my default calendar.

 

[Rukbat]

What do you mean by "Default"? The one on your home page? Delete the icon, install a calendar that links to the Google calendar (Jorte Calendar & Organizer is one of them, there are others) and drag its icon from the app drawer to your home page.