Swift - Get Local Date and Time

Swift - Get local date and time

I already found the answer.

let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "MM-dd-yyyy HH:mm"
let dateInFormat = dateFormatter.stringFromDate(NSDate())

How to get the current time as datetime

Update for Swift 3:

let date = Date()
let calendar = Calendar.current
let hour = calendar.component(.hour, from: date)
let minutes = calendar.component(.minute, from: date)

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I do this:

let date = NSDate()
let calendar = NSCalendar.currentCalendar()
let components = calendar.components(.CalendarUnitHour | .CalendarUnitMinute, fromDate: date)
let hour = components.hour
let minutes = components.minute

See the same question in objective-c How do I get hour and minutes from NSDate?

Compared to Nate’s answer, you’ll get numbers with this one, not strings… pick your choice!

How to get current date from current timezone from a time server in Swift?

If you need to make sure the date is a valid date you can use a timeserver to return the date based on the device IP, of course this will require an internet connection.

You can create a asynchronous method to return the current date regardless of the user timezone and its timezone as well:

---

struct Root: Codable {
    let unixtime: Date
    let timezone: String
}

---

extension URL {
    static let timeIP = URL(string: "http://worldtimeapi.org/api/ip")!
    static func asyncTime(completion: @escaping ((Date?, TimeZone?, Error?)-> Void)) {
        URLSession.shared.dataTask(with: .timeIP) { data, response, error in
            guard let data = data else {
                completion(nil, nil, error)
                return
            }
            do {
                let decoder = JSONDecoder()
                decoder.dateDecodingStrategy = .secondsSince1970
                let root = try decoder.decode(Root.self, from: data)
                completion(root.unixtime, TimeZone(identifier: root.timezone), nil)
            } catch {
                completion(nil, nil, error)
            }
        }.resume()
    }
}

---

Usage:

URL.asyncTime { date, timezone, error in
    guard let date = date, let timezone = timezone else {
        print("Error:", error ?? "")
        return
    }
    print("Date:", date.description(with: .current))  // "Date: Tuesday, July 28, 2020 at 4:27:36 AM Brasilia Standard Time\n"
    print("Timezone:", timezone)   // "Timezone: America/Sao_Paulo (current)\n"
}

How to get the current date and time of another timezone in Swift?

There are a number of ways to get a local time, such as using string time zone identifiers and seconds from GMT. And there are a number of formats to express time, such as strings and native Date objects. You didn't specify much in your question, so here's a starting point:

func localTime(in timeZone: String) -> String {
    let f = ISO8601DateFormatter()
    f.formatOptions = [.withInternetDateTime]
    f.timeZone = TimeZone(identifier: timeZone)
    return f.string(from: Date())
}

print(localTime(in: "Asia/Tehran")) // 2019-11-20T20:17:13+03:30 (8:17 PM)

How many time zones there are in the world is not entirely definitive but the general consensus appears to be 38. I prefer using secondsFromGMT because it's more deterministic than using string identifiers because the string identifiers are subject to change (as this is a Swift library), while secondsFromGMT cannot (without a change in the timezone itself).

// For a list of all time zone string identifiers
for timeZone in TimeZone.knownTimeZoneIdentifiers {
    print(timeZone)
}

Unfortunately, secondsFromGMT does not recognize fractional time zones, and there are quite a few; therefore, we can use both methods to get a complete list of 38:

-12:00 TimeZone(secondsFromGMT: -43200)

-11:00 TimeZone(secondsFromGMT: -39600)

-10:00 TimeZone(secondsFromGMT: -36000)

-09:30 TimeZone(identifier: "Pacific/Marquesas")

-09:00 TimeZone(secondsFromGMT: -32400)

-08:00 TimeZone(secondsFromGMT: -28800)

-07:00 TimeZone(secondsFromGMT: -25200)

-06:00 TimeZone(secondsFromGMT: -21600)

-05:00 TimeZone(secondsFromGMT: -18000)

-04:00 TimeZone(secondsFromGMT: -14400)

-03:30 TimeZone(identifier: "America/St_Johns")

-03:00 TimeZone(secondsFromGMT: -10800)

-02:00 TimeZone(secondsFromGMT: -7200)

-01:00 TimeZone(secondsFromGMT: -3600)

+00:00 TimeZone(secondsFromGMT: 0)

+01:00 TimeZone(secondsFromGMT: 3600)

+02:00 TimeZone(secondsFromGMT: 7200)

+03:00 TimeZone(secondsFromGMT: 10800)

+03:30 TimeZone(identifier: "Asia/Tehran")

+04:00 TimeZone(secondsFromGMT: 14400)

+04:30 TimeZone(identifier: "Asia/Kabul")

+05:00 TimeZone(secondsFromGMT: 18000)

+05:30 TimeZone(identifier: "Asia/Colombo")

+05:45 TimeZone(identifier: "Asia/Kathmandu")

+06:00 TimeZone(secondsFromGMT: 21600)

+06:30 TimeZone(identifier: "Asia/Yangon")

+07:00 TimeZone(secondsFromGMT: 25200)

+08:00 TimeZone(secondsFromGMT: 28800)

+08:45 TimeZone(identifier: "Australia/Eucla")

+09:00 TimeZone(secondsFromGMT: 32400)

+09:30 TimeZone(identifier: "Australia/Adelaide")

+10:00 TimeZone(secondsFromGMT: 36000)

+10:30 TimeZone(identifier: "Australia/Lord_Howe")

+11:00 TimeZone(secondsFromGMT: 39600)

+12:00 TimeZone(secondsFromGMT: 43200)

+12:45 TimeZone(identifier: "Pacific/Chatham")

+13:00 TimeZone(secondsFromGMT: 46800)

+14:00 TimeZone(secondsFromGMT: 50400)

iOS Swift - Get the Current Local Time and Date Timestamp

For saving Current time to firebase database I use Unic Epoch Conversation:

let timestamp = NSDate().timeIntervalSince1970

and For Decoding Unix Epoch time to Date().

let myTimeInterval = TimeInterval(timestamp)
let time = NSDate(timeIntervalSince1970: TimeInterval(myTimeInterval))

How can i get Local DateFormat with swift?

You can use :

dateFormatter.dateStyle = .short
dateFormatter.timeStyle = .short

But these won't come in the same format dd.MM.yyyy HH:mm

How to Convert date into local time zone ios swift

If you want the result to be a Date object just use the first part of @Intellij-Shivam's answer:

func serverToLocal(date:String) -> Date? {
    let dateFormatter = DateFormatter()
    dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ssZ"
    dateFormatter.timeZone = TimeZone(abbreviation: "UTC")
    let localDate = dateFormatter.date(from: date)

    return localDate
}

(note that DateFormatter.date(from:) returns an optional, which is correct because the input date string might not be in the correct format.)

There is no such thing as a Date in your local time zone. Dates don't have a time zone. They record an instant in time all over the planet.

To display a date in your local time zone you can use the DateFormatter class method localizedString():

let dateString = DateFormatter.localizedString(
  inputDate, 
  dateStyle: .medium, 
  timeStyle: .medium)

Create a local date at a specific time in Swift

The answer – as already mentioned in the comments – is: print displays Date instances in GMT. 2018-01-26 23:00:00 +0000 is the same point in time as 2018-01-27 00:00:00 +0100

Apart from that I'd like to suggest a much more reliable way to get todayStartDate and todayEndDate using Calendar's powerful date math skills.

let calendar = Calendar.current
var todayStartDate = Date()
var interval = TimeInterval()
calendar.dateInterval(of: .day, start: &todayStartDate, interval: &interval, for: Date())
let todayEndDate = calendar.date(byAdding: .second, value: Int(interval-1), to: todayStartDate)!

print(todayStartDate)
print(todayEndDate)

How can I determine the time zone of a given (local) date

The answer was quite simple - still I didn't see it for hours. The trick is to set a timeZone for the DateFormatter.

            let dateFormatter = DateFormatter()
        dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ssZ"
        let dateUTC = dateFormatter.date(from: current.currentObservation[0].timeUTC)!
        dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
        dateFormatter.timeZone = TimeZone(abbreviation: "UTC")
        let dateLocal = dateFormatter.date(from: current.currentObservation[0].timeLocal)!

        let difference = Calendar.current.dateComponents([.second], from: dateUTC, to: dateLocal).second!

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