Mexico Time Zone

According to from where you come to Mexico, you should know the time zone since Mexico covers three time zones. From the first Sunday of April to last Sunday in October clocks go forward one hour and in the winter, from the last Sunday of October until the first Sunday of April clocks go one hour back.
In the South, central and Eastern Mexico is -5 GTM in summer and in winter -6 GMT. These are two of the official Mexican time zones.