1) how can you have 2 birth certificates ?One individual cannot be permitted to hold two birth certificates containing two different birth dates as the identity of a person is established not only by his name and parentage but also by his date of birth

2) your earlier birth certificate has to be cancelled

3)  Apply to the Registrar of Births and Deaths who issued the wrong one, giving proof of error, to cancel it.

4) in case they refuse file writ petition in HC to cancel earlier  birth certificate 

You have 2 birth certificates ?

So you may follow the procedures as  advised to you by the authorities concerned 

According to the SOP for DOB update -exceptional handling, you need to follow these steps:

• Visit an Aadhaar enrolment/update centre and fill the Aadhaar update form with the correct date of birth and attach a self-attested copy of your valid birth certificate.
• You will also need to attach a self-declaration letter stating the reason for updating your date of birth and mentioning your previous and current date of birth.
• You will also need to attach a proof of cancellation of your previous birth certificate, such as a letter from the issuing authority or a court order.
• You will receive an acknowledgement slip with an update request number (URN) after submitting your documents and paying the update fee of Rs. 50.
• You will need to send a scanned copy of your acknowledgement slip, self-declaration letter, birth certificate, and cancellation proof to the email address of the UIDAI regional office that covers your state. You can find the email address and other contact details of the regional offices here.
• The regional office will verify your documents and forward your request to the tech centre for processing/reprocessing. You will receive an email confirmation once your request is approved or rejected.
• You can check the status of your update request online using your URN here or by calling the toll-free number 1947.

- If you have submitted earlier birth certificate in first updating , then the authority of Aadhar will not accept another request to change the DOB after submitting a new birth certificate 

- Hence, now you will have to submit a cancellation report /certificate from the authority from where the first certificate was issued with an affidavit that the new certificate should be accepted for the alternation of DOB. 

You can go to UiDAI with cancel slip but if they insist 

you can file writ petition in HC to direct registrar ti cancel birth certificate in his records 

- If you got the cancellation slip , then the registrar cannot refuse for accepting the same 

- Yes, you can approach the UIDAI for changing the DOB on the ground of this slip 

Yes

Dear Client,

Since the registrar is saying there is no option of cancelling birth certificate in online. You may go to UIDAI with the cancelled slip. The UIDAI officials will be able to verify the cancellation of your previous birth certificate and update your DOB in Aadhaar accordingly.

Thank you.

You can take a decision based on your circumstances, if this will solve your problem, you can go ahead.

Yes you can.do that 

You cannot cancel your birth certificate but as per your concern you can change your date of birth by taking an appointment at aadhar centre situated in Delhi.. If it don't work thn you have option to file a writ petition in high court