Simplify the following text for a Grade 6 native English-speaking person.
Original: Therefore , in meteorology for the Northern hemisphere , spring begins on 1 March , summer on 1 June , autumn on 1 September , and winter on 1 December .
Simplified: In Denmark , spring begins on March 1 , summer on June 1 , autumn on September 1 and winter on December 1 . In Australia , summer begins on December 1 , autumn on March 1 , winter on June 1 , and spring on September 1 .