The international standard recommends writing the date as year, then month, then the day: YYYY-MM-DD. So if both the Australian and American used this, they would both write the date as 2019-02-03. Writing the date this way avoids confusion by placing the year first.

What is YYYY-MM-DD date format?

Date/Time FormatsFormatDescriptionMM/DD/YYTwo-digit month, separator, two-digit day, separator, last two digits of year (example: 12/15/99)YYYY/MM/DDFour-digit year, separator, two-digit month, separator, two-digit day (example: 1999/12/15)46 more rows