EDTF Min/Max Calculator

Extended Date/Time Format is particularly useful for entering date ranges or dates with varying precision. Many data visualization and analysis tools, though, like well-behaved, precise dates. This tool accepts a list of EDTF-formatted strings (one per line) and returns the earliest and latest exact dates implied by the original EDTF string.

I wrote a short blog post about this tool with some further examples.

Note: none of your data leaves your computer! The parsing happens locally, in your browser, thanks to Sylvester Keil's JavaScript library, edtf.js.

Summary: values parsed, blanks skipped, errors encountered.