It fell about the Lammas tide, When the muir-men win their hay, The doughty Douglas bound him to ride Into England, to drive a prey.

-Ballads
'The Battle of Otterbourne', opening lines.

It was upon a Lammas night, When corn rigs are bonie, Beneath the moon's unclouded light, I held awa to Annie.

-Burns, Robert
  'Song, The Rigs o'Barley', or 'Corn Rigs  AreBonie', stanza1.