Simplify the following text for a Grade 6 native English-speaking person.
Original: Although Tropical Depression One formed on May 28 , the season officially began on June 1 , 2009 and ended on November 30 .
Simplified: The season started on June 1 , 2009 and it ended on November 30 , 2009 . In this season Tropical Depression One formed early , on May 28 .