With the World Cup this month, many users usually download apps for reminders about matches, or download the excel sheet that keeps tabs about match scores and game dates and such.
Fortunately, there is an alternative, a much easier one at that. Simply open this link from your iDevice, and click on subscribe to calendar, and all the matches along with their correct time (depending on your geographic region) will appear as calendar entries in you calendar app!
Also, if you have enabled calendar sync between your devices, you just just to follow this procedure once and the matches will appear on all your devices, otherwise you need to click on the link from every device you wish to sync the World Cup info to.
Enjoy!