Saturday, November 1, 2014

Astronomical Cross Quarter Dates 2015 to 2019

There are two sets of dates which can be used to determine when the cross quarter days fall. The first is simply a set of fixed dates, although those dates can vary slightly from person to person, tradition to tradition. Fixed days are perhaps more commonly used. With fixed dates Imbolc is always from sundown on the 1st to 2nd of February, or Samhain is sundown on October 31st to sundown on November 1st - or whatever dates one chooses to use, the same dates will be used every year.

However, there is also the method where the dates are calculated by the position of the solstices and equinoxes of the year. For example, Imbolc would be the exact midpoint between the winter solstice and spring equinox, and Beltaine would be the midpoint between the spring equinox and summer solstice, and so on. Since the solstices and equinoxes can shift slightly from year to year, so can the cross quarter dates when using this method.

The following is a chart of cross quarter dates based on the solstices and equinoxes for 2015 to 2019, all based on Eastern Standard Time.

2015
Imbolc - February 3
Beltaine - May 5
Lammas - August 7
Samhain - November 7

2016
Imbolc - February 4
Beltaine - May 4
Lammas - August 6
Samhain - November 7

2017
Imbolc - February 3
Beltaine - May 5
Lammas - August 7
Samhain - November 7

2018
Imbolc - February 3
Beltaine - May 5
Lammas - August 7
Samhain - November 7

2019
Imbolc - February 3
Beltaine - May 5
Lammas - August 7
Samhain - November 7

4 comments:

  1. There are actually three ways to calculate this, Allie. The third way has to do with the Sun and Moon in the Fixed Signs. ;)

    ReplyDelete
    Replies
    1. Admittedly, I don't really have much interest in astrology, but the last time I saw that explained it seemed to work out to the same dates as above. Is that not the case?

      Delete
  2. I do not know if that equals the same dates or not, but the traditional "fixed signs" are commonly:
    Samhain – Sun at 15° Scorpio
    Yule (Winter Solstice) – Sun at 0° Capricorn
    Imbolc – Sun at 15° Aquarius
    Ostara (Vernal Equinox) – Sun at 0° Aries
    Beltane – Sun at 15° Taurus
    Litha (Summer Solstice) – Sun at 0° Cancer
    Lughnasad – Sun at 15° Leo
    Mabon (Autumn Equinox) – Sun at 0° Libra

    ReplyDelete
    Replies
    1. As far as I can tell, this seems to be another way to calculate the same mid-points. As an example, 15° Scorpio (Samhain) is the direct midpoint between the autumn equinox and winter solstice, which would land on Nov 7th. Unless the astrological solstices and equinoxes don't fall at the same time the astronomical ones do? It seems they do, but again, not really something I've put a lot of study into, myself. :)

      Delete