It is important, particularly since this wiki will be used around the world, that dates are recorded in an unambiguous format. This is best achieved by spelling out the month. 10 November 1900 and October 11, 1900 are unambiguous and both are acceptable.
But 06/07/1900 and 07/06/1900 aren't! To the British, they are 6 July & 7 June 1900 respectively and to an American they are the reverse, June 7, 1900 & July 6, 1900.
Please also ensure the year is given as a four digit number.