Different Date of birth in Matric Marksheet and Transfer C.

Respected Sir, My DOB as per municipal records is 12-03-1992 But My DOB according to ICSE 2009 certificate is 12-03-1993 And again in my Transfer & Bonafide Certificates (of both 10th and 12th) the DOB is 12-03-1992 (Which is the right one) I ignored the mistake in my matric certificate as there was an advantage of one year. Now the problem is i have "certificate verification" for entrance exams and the DOB in the marks memo and the TC/Bonafide mismatch. So they may reject me for having double DOBs. I have also learned that ICSE doesnt entertain any change in the memo after 2 years of passout. and its already 2 years 4 months till date. Is there any legal procedure to follow to get out of this situation else I have to abandon my studies for such clerical mistake. I will be oblidged if you help me out. Yours faithfully, Raunak Hazra