how do i move a function to the top centre of my page?

You’ll need CSS. If you’re writing your date into a div with id=”date”, then:

#date{
           margin: 0px auto;
           text-align: center;
 }

should do. This is assuming you have no other elements above the div.

But if there are other elements coming before it, then you will have to add a position attribute and specify a distance from the top.

#date{
           margin: 0px auto;
           text-align: center;
           position: fixed;
           top: 0;
 }