Yes in British English we say or write the day first, then the month, and finally the year in full.
In American English the format is Month first then the day then the full year.
However in both British and American you can omit the first part of the year if you want
10/3/19 Tenth March 2019 = British
10/3/19 Third day of tenth month = American 3rd of October 2019.
sometimes this can cause problems in international communications, but not as much as it used to because of the fact that all computers usually come pre programmed with American settings and the world is adjusting to this.