Daylight-saving time began Sunday, but not in Mexico, which can create headaches for tens of thousands of people who cross the border daily for work or school.

The time won't change in Mexico until April 6. Until then, there will be a one-hour time difference between San Diego and Tijuana. For example, when the clock says 8 a.m. in San Diego, it will be 7 a.m. in Tijuana.

The situation first arose last year, after Congress ordered an earlier start in daylight-saving time in the United States as a way to save energy.

Baja California officials said last year they would try to get federal permission to match California's hours this year. But when the state administration changed, officials literally ran out of time.

To help ease the problem for border crossers at Otay Mesa, U.S. Customs and Border Protection will keep the SENTRI fast-pass lane open for an extra hour in the evenings.

The Otay SENTRI lane hours for the next four weeks will be 5 a.m. to 9 p.m. PDT, Monday through Friday. The lane will close at 1 a.m. PDT on weekends and holidays. Regular lanes at both crossings and SENTRI in San Ysidro already operate around the clock.

– from Pablo Jaime Sainz