NUDC 4 and previous had a neat feature where you could create Moon Cycles events in your calendar. I can't find it in Now X, and the moon events wouldn't import properly from NUDC 4. Is there any way to do this in Now X?
Subscribe to the moon phase calendar with iCal. Then sync Now X to iCal. It won't have those nice pretty moon icons but it'll tell you the moon phases on certain dates.
BusyCal has built-in moon phases and built-in connection to AccuWeather as well. Sadly, you won't be able to transfer that to Now X because it is a BusyCal only feature.