When a product on Amazon says it takes two days to arrives, Sunday typically doesn't count. Hey, that's no jab against the company, as this is standard practice in the shipping industry. But now Amazon is expanding Sunday delivery to fifteen cities, giving millions of customers the chance to see this new delivery date show up at checkout. The cities are concentrated in only a handful of states, with six of them situated in Texas alone. Kentucky, Louisiana, and Ohio each find two of their most densely populated areas supported; while Indiana, Oklahoma, and Pennsylvania each appear with one. These areas all join New York City and Los Angeles, where Amazon has tested Sunday delivery since November of 2013. Amazon and the US Postal Service plan to roll out Sunday delivery to more areas over the course of the year.