As per the UPSC CSE age criteria, a student must be with in the range of 21 to 32 years on August 1, 2022, in order to be eligible for the examination. Now there are age relaxation for the SC/ST and other reserved categories.

On August 01, 2023 your age will be 37 years 6 months 14 days. So if you are an aspirant from Unreserved or General category then you are not eligible.

For the age relaxation criteria consider the link provided below:

https://competition.careers360.com/articles/upsc-ias-eligibility-criteria

I hope this helps. Wish you a great day!