What client software are you using to view the table?

It seems like the problem comes from this software setting which is displaying the table in this format by default.

It could also come from your computer regional settings.

Also it seems you are confusing date formats :

US is MM/DD/YYYY

UK is DD/MM/YYYY

The one you are viewing : YYYY/MM/DD is another one intended to remove the doubt between UK and US formats.
It is the more logical (if you name your files using this format, alphanumeric sorting will be the right date order.)

So using YYYY/DD/MM will be very confusing!