By using consistent three-month groupings, scientists can more accurately compare weather patterns from year to year without the slight "drift" of astronomical dates. The Phenological Definition: Following Nature
Spring is a complex, multi-scalar season defined by astronomical markers and manifested through climate-driven biological processes. Its timing and character vary regionally and are shifting under climate change, with cascading ecological, agricultural, and cultural impacts. spring definition season
This is "nature’s clock". It’s defined by biological signs—like when the first daffodils bloom, the swallows return, or the trees start showing their first tiny green buds. Why We Love It By using consistent three-month groupings