change date placeholde

the default placeholder for the input type=date is like dd/mm/yyyy i would like to change it to gg/mm/aaaa. i did so like this:

type="text" placeholder="gg/mm/aaaa" onfocus="(this.type='date')"

but its not exactly what i want because on focus it turns to dd/mm/yyyy. is there any other way around it?