Why is, these days, that any time a business makes a decision to do something it must be because of greed! Just how much is Sears going to earn adding an amount of time to the hours they are open that comes to less than 2/10 of 1% of regular hours? Maybe you would have an argument if the store was open a full schedule. Also there is no mention of the store policy on leave for the day!!
There are a number of possibilities. Customer request. An attempt to recover from losses resulting from customer reaction to their feelings about the economy.