The story
So-called because it (typically) falls when blackthorn is flowering.
Etymology from Wiktionary, CC BY-SA 4.0.
blackthorn winter
Today it means: A period of cold weather in spring or early summer (March, April or May). Full definition →
Today it means: A period of cold weather in spring or early summer (March, April or May). Full definition →
So-called because it (typically) falls when blackthorn is flowering.
Etymology from Wiktionary, CC BY-SA 4.0.