Definition of opponent for English Language Learners. : 1  a person, team, group, etc., that is competing against another in a contest. : 2  a person, group, etc., that is against something (such as an action, law, or system) : someone or something that does not want something to exist, be done, etc.
On the Celtic calendar, the traditional first day of winter is 1 November (Samhain, the Celtic origin of Halloween); spring starts 1 February (Imbolc, the Celtic origin of Groundhog Day); summer begins 1 May (Beltane, the Celtic origin of May Day); the first day of autumn is 1 August (Celtic Lughnasadh).
Winter officially begins at the winter solstice (December 21 or 22) and ends at the spring equinox (March 21 or 22). However, the cold weather and snow can arrive sooner and stay much later. The amount of snow Vermont receives varies from winter to winter and from one region of the state to another.