US date/time is actually closer to the ideal notation if you consider that for the majority of date references you don't need the year, so July 4th at 12:45:59 actually makes sense and denotes time from most to least significant digit. If you just shift the year to the front, you have an ideal naming convention and no confusion in identifying month and day.

In European, the date goes from least significant to most significant digits for the year and most to least significant for the time. For all the valid arguments on the side of the metric system vs imperial, if you ever want to shut the argument down for date formatting just ask why they don't keep the same format for date as they do for time, say 59:45:12 4/7/2023? For consistency that is how they should write 59 seconds after 45 minutes after the 12th hour of the 4th day of the 7th month of the year 2023.