Is there a way to do this based on the year the wallet was created?

I'm trying to decrypt an old wallet.aes.json of my own. The blockchain.info MyWallet version is not listed in the hash, but I created the account in late January 2014. I want to make sure I'm using correct number of rounds against the encryption.

I'm using Hashcat (to leverage my GPUs) against the hash file, and the "blockchain2john.py" script to extract the hash from wallet.aes.json. (see here: https://raw.githubusercontent.com/magnumripper/JohnTheRipper/bleeding-jumbo/run/blockchain2john.py)

Any tips for making sure I've got the right hash?

Thanks.