Lammas (or Lughnasadh) occurs in late July and early August. It marks the beginning of the harvest. It's the first of three harvest festivals and is usually associated with ripening grain. It heralds the coming of Autumn.
Cornflower in a wheat field. In the past it often grew as a weed in crop fields, hence its name (fields growing grains such as wheat, barley, rye, or oats are sometimes known as corn fields in the UK).