Readable dates and chronological order

Display a date for the reader without changing its timeline. Learn day, month and year tokens, retaining the source date for sorting.

`strftime` returns display text: `%d` day, `%m` month, `%Y` four-digit year. Day/month/year text is not chronological sorting; use the uniform `ISO` source here.

Readable dates and chronological order: `strftime` returns display text: `%d` day, `%m` month, `%Y` four-digit year. Day/month/year text is not chronological sorting; use the uniform `ISO` source here.