YYYY-MM-DD is Largest -> Smallest
DD/MM/YYYY is Smallest -> Largest
HH:mm:ss is Largest -> Smallest
These all follow conventions in the order.
MM/DD/YYYY is Middle -> Small -> Large
All conventions are gone; cats and dogs are living together and there is mass hysteria.
It wouldn't be so bad if the formats were mutually exclusive but some American dates work with some rest of the damn world dates and vice versa which causes no end of problems.