Using this Harry Potter Hogwarts perpetual calendar is easy. First, adjust the three cubes to show the correct month and the two cubes to show the day. You can do this whenever the date changes. To keep it looking great, avoid placing it in direct sunlight as it may fade the hand - painted colors over time. If it gets dirty, you can gently wipe it with a soft, dry cloth. Don't use any harsh chemicals or abrasive materials as they might damage the resin surface. This calendar is not just a tool to tell the date, but also a beautiful decoration, so handle it with care to enjoy it for a long time.