break-up season
n.— «Warmer weather in Western Canada means the winter thaw of ice and snow—or “break-up season,” as it’s known in the industry—has started early this year, effectively making the winter drilling season two to three weeks shorter than normal.» —“Early spring halts drilling season” by Norval Scott in Calgary Globe and Mail (Toronto, Canada) Mar. 14, 2007. (source: Double-Tongued Dictionary)
Further reading
After our conversation about the expression dingle day, a term used by workers at a research station in Antarctica to denote bright, sunny weather, a listener offers a possible explanation for this term. It may derive from the idea of the skies...
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