Here's what the federal government could do to eliminate daylight saving time in 2023
The head of the Executive could use his power to send a preferential initiative, which would force legislators to analyze and vote on the bill in just one month

Yes, Mexico has 4 time zones: the differences between Northwest, Pacific, Central and Southeast time
The Time System Act recognizes for Mexico the application and validity of the time zones 75 degrees, 90 degrees, 105 degrees and 120 degrees west of the Greenwich meridian
