[rkangel]

The main benefit of Y-M-D, is that no-one uses Y-D-M, and the 'Y' component is easily recognisable. So if you use Y-M-D, then everyone knows it's Y-M-D and there is no ambiguity.

[isostatic]

I found out recently the x509/tls certa are YYMMDD

200122

For example. Amazing.