Today is the Spring Equinox for 2015 which marks the first day of Spring. In millenia passed, the Spring Equinox was celebrated as a "holy day" and when Easter was established, it fell on this day. Later, it came to be celebrated on the first full moon after the Spring Equinox, and finally the Christians started celebrating it on different days, usually a Sunday one or two weeks afterward.
http://www.timeanddate.com/calendar/determining-easter-date.html
Looking at these celestial events and knowing their once clear connection to "holy days" is interesting. Also, if you happen to get a chance to observe high noon on any given day, note the time on your phone or watch and see how far "off" it is from the actual Noon hour (as determined by the Sun's position overhead in your location). Use a sundial or a stick in the ground to determine the actual high noon.
The next major celestial milestone is the Summer Solstice (which is the counterpart to the Winter Solstice which coincides closely with Christmas), but no Western "holy day" or celebration is attached to it. I find that interesting.
http://www.timeanddate.com/calendar/determining-easter-date.html
Looking at these celestial events and knowing their once clear connection to "holy days" is interesting. Also, if you happen to get a chance to observe high noon on any given day, note the time on your phone or watch and see how far "off" it is from the actual Noon hour (as determined by the Sun's position overhead in your location). Use a sundial or a stick in the ground to determine the actual high noon.
The next major celestial milestone is the Summer Solstice (which is the counterpart to the Winter Solstice which coincides closely with Christmas), but no Western "holy day" or celebration is attached to it. I find that interesting.