Along with the confusion comes a renewed debate on whether daylight-saving time actually makes sense or does the job of saving energy.

This is the second year that daylight-saving time is four weeks longer than it used to be. The shifting of one hour of daylight from morning to night is part of the Energy Act of 2005, designed to extend daylight in the afternoon, reduce the use of artificial lighting and save energy.

A new study shows daylight-saving tune may waste energy, at least in Indiana. Researchers at the University of California – Santa Barbara compared electricity meter readings in the split time-zone state over the past three years before and after daylight-saving time was adopted in most counties.

“And what we find is that is about a 1- to 4-percent percent increase in electricity consumption in places that experienced daylight-saving time for the first time in 2006,” said Matthew Kotchen, an economics professor at UCSB.

Kotchen says that adds up to an average annual increase of $3.16 that each household spent in extra heating and cooling costs.

Researchers say the social benefits of using the extra hour of sunlight may outweigh any extra costs.

So, to clarify, at 2 a.m. Sunday, clocks jumped an hour ahead to 3 a.m.