Not that it matters to many of us

Thanks for letting us know!

But, I wish that they would do away with this stupid DST altogether.

Does it matter with smart phones and auto updates?

Even smart phones need up to date time zone details

Well I don't know what they updated for Mexico since Mexico has done away with the stupid outdated DST which may have had a purpose 100 - 150 years ago but not now !

updating several Garmin devices.

Quoting https://www.timeanddate.com/time/change/mexico#:~:text=Most%20of%20Mexico%2C%20including%20its,Daylight%20Saving%20Time%20(DST);

"Most of Mexico, including its capital Mexico City, doesn't use Daylight Saving
Time (DST). However, some exceptions exist for the
locations that follow the DST schedule of the United States:

Baja California observes DST and uses the same time zones as neighboring
California in the US. Here, the DST period starts on the second Sunday in
March and ends on the first Sunday in November.

Sonora does not change its clocks to stay in sync with the neighboring US state
of Arizona, where Mountain Standard Time (MST) is observed all year.

Municipalities near the country's northern border with the US keep the DST
schedule for practical and socioeconomic reasons. This includes the
municipalities Ciudad Juárez and Ojinaga in Chihuahua, Colombia in Nueva
Leon, and Reynosa in Tamaulipas.

I’ll check mine.