time zone off by one hour central america vs microsoft ... daylight savings?

I live in Costa Rica.

Since the daylight savings change, which are not observed in Central America, iCloud's calendar (iCloud.com, iPad and iPhone) is off by one hour.

It is frustrating as meetings generated within Microsoft Outlook, in Windows, get synchronized at the wrong time (1-hour off) in all my IOS devices.

I have correctly set "San José, Costa Rica", in icloud.com, my iphone and ipad; and "Central America" in Windows 8.1.

All meeting invitations I set and send through Outlook, in my PC, are received with the correct time by all colleagues. All meetings that I send through my IOS devices, arrive 1-hour off.

HELP!!!!!!!!