eliteseal a big flaw on this watch is that the moon phase shows a crescent moon at night. They changed it to be a moon in both day and night in the 5396 model released in August 2018. That model is more accurate as there are two moons in the moon phase indicator. Although this is a day/night indicator. Not a working moonphase like in the ZF JLC. There is a whole thread on this watch you need to read under the Patek section:
The fonts are not correct and aligned in the calendar functions. Specially the date lies very deep. And also the month has to be changed monthly while the others change with time.