This is very cool! I’ve been playing with timefhuman and recurrant plus GPT-3 for really tricky user input.
To parse human-written dates, time.lol currently uses a combination of the JavaScript libraries Day.js [1] and Sugar [2].
If Day.js can't determine a valid date from the given input, then Sugar is invoked to try even harder :) Seems to work well so far, but indeed it falls short with complex input (e.g. "The Tuesday after July 4th").
https://metacpan.org/dist/Date-Manip/view/lib/Date/Manip/Exa...