"Rogation" comes from the Latin "rogare," which means "to ask," and "Rogation Days" are days during which we seek to ask God's mercy, appease His anger, avert His chastisements manifest through natural disasters, and ask for His blessings, particularly with regard to farming, gardening, and other agricultural pursuits.
They are set aside to remind us how radically dependent we are on mother Earth, and how prayer can help protect us from nature's often cruel ways. ..." --
" ... beseeching God and His Saints to protect us from disaster, and doing penance so He does not see us as His enemies are what Rogation Days are about.
These days are divided between the Major Rogation -- 25 April (by coincidence alone, the Feast of St. Mark) -- and the Minor Rogation, which consists of the Monday, Tuesday and Wednesday before Ascension Thursday.
The Major Rogation is of Roman origin, instituted by Pope St. Gregory the Great (b. 540) after a great plague besieged Rome. The Golden Legend, written by Jacobus de Voragine in 1275 explains:
For as the Romans had in the Lent lived soberly and in continence, and after at Easter had received their Saviour. After, they disordered them in eating, in drinking, in plays and in lechery. And therefore our Lord was moved against them, and sent to them a great pestilence, which was called the botche of impedimy. ... " --
" The Minor Rogation Days are of French origin, coming about in the 5th c., when St. Mamertus, Bishop of Vienne, Dauphiné instituted them after a series of natural calamities. According to the Golden Legend:
For then, at Vienne, were great earthquakes of which fell down many churches and many houses, and there was heard great sounds and great clamours by night. And then happed a terrible thing on Easter-day, for fire descended from heaven that burnt the king's palace. Yet happed more marvellous thing; for like as the fiends had entered into the hogs, right so by the sufferance of God for the sins of the people, the fiends entered into wolves and other wild beasts, which every one doubted, and they went not only by the ways ne by the fields, but also by the cities ran openly, and devoured the children and old men and women. And when the Bishop saw that every day happed such sorrowful adventures, he commanded and ordained that the people should fast three days; and he instituted the Litanies, and then the tribulation ceased.
Pope St. Leo III -- the Pope who crowned Charlemagne on Christmas Day of 800 -- introduced these days of penance into Rome in 816, the year of his death, after which they became standard throughout the Roman Church. ..." --