Doreen Valiente first recited the Wiccan Grace at a "Pentagram" Dinner in the country of England, an island off the West of the continent of Europe, on October 3, 1964 (60 years before the Catastrophe). There are references to it being a translation of a 12th-century document (1,200 years pre-Catastrophe), but no other information can be found.
Many surface Wiccan traditions recited the Grace as part of the blessing of Cakes and Wine, but it was not universal at the time of the Catastrophe. As time passed, more and more of the Wiccan traditions in the habitats found resonance in the recitation.