Simplify the following text for a Grade 9 native English-speaking person.
Original: From 4 May 1910 to 29 August 1911 the navy was known officially as the Naval Service of Canada and operationally as Canadian Naval Forces .
Simplified: From May 4 , 1910 to August 29 , 1911 the navy was known as the Naval Service of Canada and operationally as Canadian Naval Forces .