The Robigalia was a festival in ancient Roman religion held April 25, named for the god Robigus. Its main ritual was a dog sacrifice to protect grain fields from disease. Games in the form of "major a
A section of the Fasti Praenestini, with the entry on the "Feast of Robigo" at bottom right ("ROB").
Bas relief from Arch of Marcus Aurelius showing sacrifice
Rogation days, also known as Rogationtide, are days of prayer and fasting in Western Christianity. They are observed with processions and the Litany of the Saints. The so-called major rogation is held
Robigalia
…along with the Great Mother's Megalensia late in the month, the "original" Roman holidays in April. The Robigalia has been connected to the Christian feast of Rogation, which was concerned with purifying and blessing the parish and fields and which took the place of the Robigalia on April 25 of the Christian calendar…
Blessing the Fields on Rogation Sunday at Hever, Kent, in 1967
Woodcut illustration of Pre-Reformation processional order, c. early 16th century