In the Anglo-Saxon calendar, Þrimilcemōnaþ (modern English: Three-Milkings Month) was the month roughly corresponding to May.
[1] The name was recorded by the Venerable Bede in his work De Temporibus (On Time) in about 703, and was so named because cows could apparently be milked three times in one day during this month.
[2] According to Bede: