How long before expiry should the notice for rent non-renewal be sent?

I rented out my flat in Dubai in Jan 2021. I live outside of Dubai and have decided to sell my unit and had notified the tenant 5 months before the expiry of the contract that I'm not going to renew.

The tenant has sent me an email stating that as per Dubai law, I have to give him a 12 months notice. This was not stated in the contract and the rental agent did not mention this to me.

Is there any way I can end the tenancy on the date the contract expires (Jan 2022)?