The title of your post is a bit confusing, as your question seems to be about credit card posting rules rather than the end of the status year. To clarify:

1. The status year runs through the end of February. This has been the case since 2022. Because 2024 is a leap year, the last day of the status year is February 29th.

2. What has changed between last year and this year is the way that LPs earned from credit card transactions in February will be credited to your AA account. Last year, the LPs credited to either the current or next status year based on the statement posting date. This year they will be credited according to the transaction date. See this post summarizing the announcement from AA: new credit card posting rules