I'm wondering how I can identify what Citi currently considers the cardmember year on my AA Plat.

I opened it years ago, eventually downgraded to a Bronze which became a MileUp, then about a year ago accepted an offer to upgrade back to the Plat. Even then, Citi has the practice of giving you another date a couple months after the conversion when it becomes complete.

Any idea which date Citi is using here as the beginning of the cardmember year? It could be the original opening date, the date I accepted the upgrade, or the date listed for the account change.