My graduation date will be held on this Sept 2011.

and I am wondering which sentence is correct?

I will be graduating this Sept


I will be graduated this Sept

I will graduate this September

I will graduate on September 23, 2011

You can say "I will be graduating this September " (as above) and it would be correct. But, I find "I'll be graduating next September" to be more natural.

I will be graduated this Sept is incorrect.

I usually hear I am a Science graduate.

Students: We have free audio pronunciation exercises.
Thank you Emotion: smile
how should I say?
I am graduated in Sience or I am graduated of Sience.... in/of?
Students: Are you brave enough to let our tutors analyse your pronunciation?
I am a graduate in Science.
 Clive's reply was promoted to an answer.