They could deal with it in an hour if they'd do it. The senate did it with a simple unanimous consent vote. Of course, that would eliminate the semi-annual time change threads here on the fire. It would save millions of people some frustration twice a year, eliminate computer programing on millions of servers.
Since when did we elect a congress to deal only with big things like getting rid of cash and perverting our children? Their job is also to deal with these small things to make life a bit easier.