The Mexican Senate passed a bill on Wednesday to eliminate daylight saving time, ending the practice of changing clocks twice a year.
Some cities and towns along the US border can maintain daylight saving time, presumably because they are so connected to US cities.
The Senate approved the provision with 59 votes in favor and 25 against, with 12 abstentions. Those who opposed the measure said less daylight in the afternoon could impact exercise opportunities for children and adults.
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The bill has already passed in the lower house of Congress and now President Andrés Manuel López Obrador will be signed into law.
The law will go into effect on Sunday, when Mexico is expected to turn back the clocks for the last time.
Earlier, Health Secretary Jorge Alcocer said Mexico should go back to “God’s clock” or solar time, arguing that setting the clock forward or backward harms people’s health.
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The measure would mean that darkness falls an hour earlier on summer afternoons.
Economists argue that while energy savings are minimal, going back to standard time could cause problems for financial markets in Mexico by taking the US East Coast markets so far.
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And businesses like restaurants that have gotten used to staying open later may have to close earlier as many crime-conscious Mexicans often try to get off the streets after dark.