Here's a relevant piece, an op-ed in yesterday's NYT by David Prerau, who wrote a book about daylight saving time:
Under the present law we have daylight time in October but not in March, even though the sun rises at similar times in both months. The European Union starts daylight time on the last Sunday in March, with few complaints. Adding one spring week of daylight time would synchronize us with Europe. Adding two weeks in the spring would double the benefit while not making a single sunrise later than those we already experience in October, thus reducing concerns about dark mornings for farmers and children heading for school.