The meaning of the phrase "game date not final"

Home page Sportik Magazine Why does the phrase “the game date is not final” exist on various websites?

Why does the phrase “the game date is not final” exist on various websites?

The association in England, Spain, Germany, Italy, the Netherlands, France and basically all over the world

We can’t set final dates a year in advance, so we set tentative dates and work according to a guideline that is as close to the date as possible. Why is that? Because teams play in European competitions, it’s difficult to schedule games in advance, and this is because it’s impossible to know which team will qualify for the next round.

So what do the associations do? They schedule games about two months in advance with precise dates,

Therefore, if you book a game more than two months in advance, you should know that the games can move a day or two, forward or backward, so you should follow the announcements.