Yesterday Mexico's Chamber of Deputies voted 445–33 to abolish DST in most of Mexico, and although there are more hurdles I expect this to become law. When that happens, I hope the following simple patch will suffice; it merely changes "max" to "2022" in the last two Mexico Rule lines. We'll also need to add commentary citing the law, etc., but you can try this patch now if you like, to debug any applications involving future time in Mexico. Today timeanddate updated their English-language summary of this <https://www.timeanddate.com/news/time/mexico-remove-dst-2022.html>. I haven't installed the following. diff --git a/northamerica b/northamerica index da84f354..2466d627 100644 --- a/northamerica +++ b/northamerica @@ -2634,2 +2634,2 @@ Rule Mexico 2001 only - Sep lastSun 2:00 0 S -Rule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D -Rule Mexico 2002 max - Oct lastSun 2:00 0 S +Rule Mexico 2002 2022 - Apr Sun>=1 2:00 1:00 D +Rule Mexico 2002 2022 - Oct lastSun 2:00 0 S