Là Fhèill Brìghde is the day the Cailleach gathers her firewood for the rest of the winter. Legend has it that if she intends to make the winter last a good while longer, she will make sure the weather on February 1 is bright and sunny, so she can gather plenty of firewood to keep herself warm in the coming months.
As a result, people are generally relieved if February 1 is a day of foul weather, as it means the Cailleach is asleep, will soon run out of firewood, and therefore winter is almost over.