Ġēolamōnaþ or Ȝēolamōnaþ (modern English: Yule month) was the Anglo-Saxon name for the month of both December and January.^[1] The Anglo-Saxon scholar Bede explains in his treatise De temporum ratione (The Reckoning of Time) that the entire winter solstice period was known as Ġēola.^[2] Later on, December became known as Ǣrra-ġēolamōnaþ and January became known as Æfterra-ġēolamōnaþ, as this later Old English passage points out:

Se mōnaþ is nemned on Leden Decembris, and on ūre geþeōde se ǣrra geōla, forðan ða mōnþas twegen syndon nemde ānum naman, ōðer se ǣrra geōla, óðer se æftera.^[3]

Which translates:

The month is called in Latin December, and in our language geōla for two months enjoy the same name; the first one Se Ǣrra Geola [The Preceding Yule] and the other Se Æftera [The Following].

• Germanic calendar
• Anglo-Saxon
• Old English