When comparing calendar dial layouts the 5396G-014 must surely rank amongst the best. Month and day are visible through two apertures towards the top of the dial at the 6 o'clock position is the moon phase 24 hour indicator and date aperture. The 324 self winding movement is housed in a perfectly proportioned 38.5mm diameter case. With 2016 marking the 20th anniversary of the annual calendar Patek decided to commemorate the occasion with a special dial. Shown here in white gold with the anniversary charcoal dial with Breguet numerals perfect for formal or casual occasions.