Comment by anotherevan

Although my (AU) locale is dd-mm-yyyy, I'll use yyyy-mm-dd anywhere I have to write a date in all numbers to avoid any ambiguity. It also has the advantage of sorting correctly in things like file names.

For something more likely to be read by a human and not parsed by a computer (and is not locale or i18n/l10n flexible) I'll use d mmm yyyy, e.g., 3 Jul 2026. To my thinking, for English speaking this is the friendliest unambiguous format (although I'm sure opinions will differ).