I'm using the day forecast api at http://openweathermap.org/forecast16. There is a parameter called list.dt. It gives a value in this format: 1406080800.
What format is that and how would I translate it to some human readable using functionality in Swift?
The date is most likely in unix time (see forecast5, which states that
list.dt is the "Time of data forecasted, unix, UTC".
Using Swift, you can use
NSDate(timeIntervalSince1970: dt) in order to convert this to a date. Then you can use standard
NSDateFormatter to make it human readable.