Kelly day
n.— «Also, anyone paying 15 percent of their health insurance will get an additional “Kelly Day,” the term for an extra day off a firefighter has the option to take or work for time and a half.» —“Firefighters OK contract with city” by James V. Franco The Record (Troy, New York) July 31, 2007. (source: Double-Tongued Dictionary)
Further reading
Whippoorwills, bob whites, and chickadees. How do we decide the names of birds and what to call their calls? Plus, the last syllables of Arkansas and Kansas are pronounced differently, but they come from the same etymological root. And: What’s the...
A firefighter named Steve in Newport News, Virginia, wonders why in his line of work, and for some police, certain additional kinds of days off after long unbroken shifts are called Kelly days, Kelly shifts, or Kelly time. The term most likely comes...