For the first time in several years, San Diego and Tijuana will not be on separate clocks when California changes off of daylight- saving time this weekend.
Most of Mexico shifted off daylight time last week, and for the past three years, the official time in San Diego and Tijuana spread an hour apart during Halloween weekend because of the two nations' different rules on daylight-savings time.
This year, Tijuana and nine other cities on the U.S. border were allowed to change to daylight time simultaneously with their sister border cities.
That means both California and Baja California will roll their clocks back one hour Saturday night, or to be more precise, at 2 a.m. Sunday.
Like 47 other states, California will "fall back" one hour when daylight-saving time ends and the state moves back to Pacific Standard Time.
The only states that do not observe daylight-saving time are Hawaii and most of Arizona.
Starting Sunday, Honolulu will move to two hours earlier than Los Angeles, instead of the current three-hour difference. Phoenix and Los Angeles will have the same local time for the next five months.
Public safety agencies are hoping to indelibly connect the end of daylight-saving time with the need to change batteries in smoke detectors and make plans for emergencies, officials said today.
Fire officials and FEMA are urging people to use the semi-annual clock changing exercise to also remove and replace batteries for smoke detectors, carbon monoxide detectors and evacuation flashlights.
The battery-changing ritual should include checking that the device has not passed any expiration date, and clearing dust from slots or sensors.
