Originally Posted by
eajusa
It's a year from the date your card opened. In this case Sept. 28.
It seems, this is not correct. I chatted with Discover and they say that for double cash back they count billing cycles, not calendar months. So, my 12th billing cycle ends on September 12, so after that day all I earn will be 1.5%.
Or, from your experience, they count calendar months?