Larrea Tridentata Grove, ADF holds open to the public rituals for each of the eight commonly recognized High Days (the equinoxes and solstices, and the half-way points between each of these):
- 1st Cross-quarter - on or about November 1st (commonly known as Samhain)
- Winter Solstice - on or about December 21st (commonly known as Yule)
- 2nd Cross-Quarter - on or about February 1st (commonly known as Imbolc)
- Vernal Equinox - on or about March 21st (commonly known as Eostre)
- 3rd Cross-Quarter - on or about May 1st (commonly known as Beltainne)
- Summer Solstice - on or about June 21st (commonly known as Litha)
- 4th Cross-Quarter - on or about August 1st (commonly known as Lughnassadh)
- Autumnal Equinox - on or about September 21st (commonly known as Mabon)
Larrea Tridentata Grove, ADF focuses primarily on two ancient Indo-European cultures, the Irish and the Greeks, for its worship. According to what we know of the Irish, the equinoxes and solstices weren't celebrated by ritual - though there is plenty of evidence to suggest that the dates weren't insignificant despite that. As such, we alternate between our two cultural foci, performing rituals for the Irish deities on the cross-quarters (also known as fire celebrations) and the Greek deities on the solar events.
Within these limits, Larrea, as much as is possible, avoids using the common neopagan High Day names for its ritual celebrations for three reasons: First, since Samhain, Imbolc, Beltainne, and Lughnassadh are simply the names of the corresponding months in Irish Gaelic, it's far more applicable to call the celebration by its English name such that the ritual is applicable to today and today's celebrants. Second, the ancient Greek holiday calendar as we know it doesn't especially coincide with the modern neopagan dates. Third, and most importantly, we, as members of a modern neopagan religion, consider it important to connect to the modern world we live in. This can be done with far less pretense when the trappings of a society outside our own isn't artificially overlaid upon our own. That is, using foreign names doesn't legitimize the practice no matter how well we may attempt to learn to pronounce the language from which they are drawn. Only real, modern and locally applicable terms used consistently can give real legitimacy.