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).
Much of the country is in the grip of icy winter weather but according to the Meteorological Office spring is here. It classes the first day of spring as 1 March, saying March, April and May are regarded as the spring months. But traditionally spring has started on the night of 20/21 March and a row has erupted over the official date. You would not regard the first three weeks of June as spring, yet historically summer does not start until 21 June, says a spokesman for the Met Office. Equally, the bulk of people now regard 1 March as the first day of spring. Bloom