Sonora stopped observing DST last year

[Paul Eggert]

To follow up on my previous message, I found a Usenet article from an
unidentified source saying that Sonora stopped observing DST last
year.  I think my next proposed change will add the following comment
to the tz data, along with a new zone America/Hermosillo.

# From <mga707 at my-dejanews.com> in <news:7e9kp7$1gq$1 at nnrp1.dejanews.com>
# (1999-04-05):
# This year the Mexican state of Sonora opted not to go on Daylight time,
# so as to remain on the same time as the neighboring state of Arizona.
# The two Nogaleses will be on the same time!

I still haven't found a confirmation of the IATA's report of changes
to the time zone in Atyrau, Kazakhstan.