So that's where DD-MM-YYYY comes in. In my language people always say dates in that order, and even when taking English I'll refer to "the 24th of March 2019". YYYY-MM-DD is, strangely enough, kind of just "a bunch of numbers" to me. If someone tells me a date in that format it'll take a second to realise it's a date. But for digital storage it's highly useful! I'm fine switching between the two formats based on the situation. The length of the year specifier makes this unambiguous.