An application for naturalization can be filed up to 3 months before continuous residency requirement has been met (INA 334, 8 USC 1445), but the guide and application instructions say 90 days before continuous residency requirement. In this respect, it is clear that USCIS sees 3 months as 90 days
90 days before 3/2/2009 is 12/2/2008 so if they received it 12/3/2008 you should be ok, depending on if the IO follows the proper guidelines. Write up a letter and reference the specific rules (INA 334, 8 USC 1445) , N-400 and M-476 instructions with the exact date you become eligible and when you filed. At the interview, present the letter to the IO and request to enter it on record as part of your application. That way you have a chance to cover yourself of any potential calculations mistakes the IO makes.
90 days before 3/2/2009 is 12/2/2008 so if they received it 12/3/2008 you should be ok, depending on if the IO follows the proper guidelines. Write up a letter and reference the specific rules (INA 334, 8 USC 1445) , N-400 and M-476 instructions with the exact date you become eligible and when you filed. At the interview, present the letter to the IO and request to enter it on record as part of your application. That way you have a chance to cover yourself of any potential calculations mistakes the IO makes.