Hi,
 
Your latest file doesn’t reflect the recent change in Cancun’s TZ information, where, starting on February 1st, TZ will be UTC-5, following the same DST rules as before (DST time would be UTC-4).
 
Local source (in spanish):
 
http://www.cenam.mx/hora_oficial/nzhm.aspx
 
 
English source:
 
http://www.oregonlive.com/travel/index.ssf/2015/01/mexican_vacation_hotspot_cancu.html
 
Br,
 
Hanna Andrés
Nokia  Networks