You should rethink your leave days from the office if you want to get to Berlin for the opening ceremony.

The reason for the above advice is that, in order for the field of the stadium to present itself in optimum conditions for the games, the World Cup comitee decided that they should move the opening ceremony to let the pitch recover.

In addition to that, the 11th match of the tournament that is supposed to take place on June 12 in Berlin will be moved back one day.

More on this issue, here.