Control day

From AMS Glossary
Jump to: navigation, search

control day

(Also called key day.) One of several days on which the weather is supposed (according to folklore) to provide the key for the weather of a subsequent period.

The best-known of these days are in the United States, Groundhog Day (2 February); in England, St. Swithin's Day (15 July). Similar beliefs are associated with other days, mostly saints' days, in many countries.
Compare singularity.

Personal tools