Ecclesiastical full moon moon is useful and necessary since the full moon may occur on different dates depending where one is in the world. The calculations to determine the date of the paschal full moon are somewhat complex, but can be described briefly as follows: In other words, Easter falls from one to seven days after the paschal full moon, so that if the paschal full moon is on Sunday, Easter is the following Sunday. Thus the earliest possible date of Easter is March 22, while the latest possible date is April 25. In 1818, as a paschal full moon fell on Saturday
Equinox a larger antenna has a narrower beam-width and hence experiences shorter duration "Sun outage" windows.) Equinoxes occur on any planet with a tilted rotational axis. A dramatic example is Saturn, where the equinox places its ring system edge-on facing the Sun. As a result, they are visible only as a thin line when seen from Earth. When seen from above – a view seen during an equinox for the first time from the "Cassini" space probe in 2009 – they receive very little sunshine, indeed more planetshine than light from the Sun. This phenomenon occurs once every 14.7 years on