The Unique Identification Authority of India (UIDAI) has clarified that the Aadhaar card, while a valid proof of identity, cannot be used as proof of date of birth (DOB). This clarification stems from the Aadhaar Act, 2016, which does not mention Aadhaar in the context of DOB verification. According to UIDAI, the date of birth recorded in Aadhaar is often based on self-declaration by the individual rather than verified documents. If valid documents are unavailable, the DOB may be recorded as 'Declared' or 'Approximate', with the system defaulting to January 1 of the estimated year. UIDAI's primary function is to issue identity numbers and facilitate authentication, rather than maintain a birth registry. Therefore, while Aadhaar can be used for identity verification in accessing various services, it is prohibited from being used as proof of date of birth, as stated by UIDAI officials.