I found something that could solve my problem in Obj-c, but I\'m not able to translate the code, so I\'m asking for a Swift solution.
I\'m parsing some data from a J
For the others who get here and don't read the comments of the initial post ;)
As @rintaro pointed out - and what was my problem too - you have to add a locale when you use fixed-format dates:
If you're working with fixed-format dates, you should first set the locale of the date formatter to something appropriate for your fixed format. In most cases the best locale to choose is en_US_POSIX
https://developer.apple.com/library/content/documentation/Cocoa/Conceptual/DataFormatting/Articles/dfDateFormatting10_4.html#//apple_ref/doc/uid/TP40002369-SW7
So in Swift 3 you would have to add
dateFormatter.locale = Locale(identifier: "en_US_POSIX")