Being pedantic here, and somewhat off topic. In general, a "date" (assuming you mean year, month and day) is not universally unique unless you provide the cale

Being pedantic here, and somewhat off topic. In general, a "date" (assuming you mean year, month and day) is not universally unique unless you provide the calendar system under which it occurred. See: https://en.wikipedia.org/wiki/Dual_dating https://en.wikipedia.org/wiki/Dual_dating This probably doesn't matter much going forward, but it does matter when addressing historical dates.