fodeja
Bear in mind that these things take some time. In UK a Select Committee of the House of Commons appointed on the 13th February 1895 (not a typo) to inquire wheter any and what changes in the present system of Weights and Measures should be adopted, recommended as follows:
-That the metrical system of weights and measures be at once legalized for all purposes.
-That after lapse of two years the metrical system be rendered compulsory by Act of Parliament.
Weight and Measures Act was passed 6th August 1897 yet more than century has passed and it seems that transition time was too short.
The way dates are expressed is numerous. Years ago I decided to go logical and started writing units in decending order for example 2001-10-31.
"Proper preparation & planning prevents piss poor performance." - Awul Dasfilshabeda and Nowaynayda Zheet