DateFormatter from “24:00” string returns Nil

Question

I cannot seem to figure out why only \"24:00\" returns nil instead of 12:00AM, whereas \"23:59\" returns correctly as 11:59PM.

let dateAsString = \"24:00\"
let d         


        

Answer 1

You are using the wrong date format for the hour component. For values from 1-24 you have to use k, if you have a leading zero you need to use kk:

let dateAsString = "24:00"
let dateFormatter = DateFormatter()
dateFormatter.locale = Locale(identifier: "en_US_POSIX")
dateFormatter.dateFormat = "kk:mm"
if let date = dateFormatter.date(from: dateAsString) {
    dateFormatter.dateFormat = "h:mm a"
    let date2 = dateFormatter.string(from: date)
    print(date2) // "12:00 AM\n"
}