CanningDates
CanningDates turns a US ZIP code into the altitude adjustments a tested canning recipe assumes the cook already knows — minutes for a water bath, pounds for a pressure canner. It refuses to extrapolate: past the last row of the USDA table it says so and points to a county extension office.
Why it earned its spot
The page is set on parchment with dark green accents and a transitional serif for headings, reading closer to a preserving handbook than a calculator. Its signature element is the result card — a ruled, letterspaced jar label sized to print for a regular-mouth lid, so the answer leaves the screen as an object that ends up on a pantry shelf. Below the lookup, the three USDA band tables sit in plain view rather than hidden behind the form, and the low-acid safety note gets its own boxed rule. The pacing is unhurried: one question, one label, then the reasoning.
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