Here is an Imbolc traditional poem:
Thig an nathair as an toll
Là donn Brìde,
Ged robh trì troighean dhen t-sneachd
Air leac an làir.
"The serpent will come from the hole
On the brown Day of Bride,
Though there should be three feet of snow
On the flat surface of the ground."
Pictures from One Vibration.