HOW TO CENTER GADGETS HEADER IN BLOGGER (WORKING)

Log into your Blogger account and then click on your blog name
Go into the Template section on the left
Then click the orange Customize button
Then go to the Advanced section on the left
Scroll down to Add CSS

Code to center your Gadget Headers in Blogger:

.widget {
  text-align: center;
}

Just Copy/paste (or type) them into the Add CSS field, and then hit enter between each one.