It'a DD/MM/YY in Canada. Opposite of USA MM/DD/YY, but the same as UK practice.
But I don't see the point in using only numerals in the first place, it doesn't take any more bits to write 14MR18 or MR1418 than to write 140318 or 031418, and then there's no ambiguity. The / is inserted only when entering or viewing data, the computer or application ignores it, so it's presence or absence has no effect on the number of bits used to store the date.
When I was in College (and this was before Macintosh and IBM PC but after the Apple ][ or Tandy and all those that came before it) I marked my notes as such in the top right corner:
010282.01 (meaning January 2 1982 page 1) thru (for example) 012282.51 (meaning January 22 1982 page 51).
The reason was in this way there was a pure continuity from the first page to the last in numerical order, so I could more easily find my notes for study.
But if you used that date format on your rent cheque, the bank would probably return it since legally 0102 1982 meant February 1, one month in the future from January 2.