The first dividend pay date under the new formula is May 16 for shares on record as of May 13. Which means the stock goes ex-dividend on May 9.

All that is a long, complicated and unnecessarily obscure way to say that if you want to collect this quarter’s dividend of $3.05 a share, today is your last chance to buy the stock.

Since Apple announced the increased dividend and stock buyback plan, its shares have climbed more than 18%.