For date Input "00/02/02"
formating Style is yy/MM/dd
I am getting correct output like 02/01/2000
But issue is when trying with "00/01/01"
getting output like this '01/01/12100'
But I don't know why this year coming like 12100
My code is
let str = "00/01/01"
let inputFormatter = DateFormatter()
inputFormatter.dateFormat = "yy/MM/dd"
if let showDate = inputFormatter.date(from: str) {
inputFormatter.dateFormat = "dd/MM/yyyy"
let resultString = inputFormatter.string(from: showDate)
print(resultString)
}
year input type always as yy format.
As per the #MartinR suggestion
settinginputFormatter.defaultDate to current date or Date(timeIntervalSinceReferenceDate: 0) its worked fine
let str = "00/01/01"
let inputFormatter = DateFormatter()
inputFormatter.defaultDate = Date(timeIntervalSinceReferenceDate: 0)
inputFormatter.dateFormat = "yy/MM/dd"
if let showDate = inputFormatter.date(from: str) {
inputFormatter.dateFormat = "dd/MM/yyyy"
let resultString = inputFormatter.string(from: showDate)
print(resultString)
}
I managed to reproduce this bug by setting the timezone of the formatter, before getting the date from it, to your local timezone:
inputFormatter.timeZone = TimeZone(identifier: "Asia/Kolkata")
//Or
inputFormatter.timeZone = TimeZone(identifier: "Asia/Calcutta")
They both lead to 01/01/12100.
Actually, using a date format of yy/MM/dd hh:mm:ss, all dates starting from 00/01/01 00:00:00 to 00/01/01 05:29:59 give a year component of 12100. This is due to the time zone of Kolkata being offset by +05H30 from GMT. This is a bug.
Setting the timezone to UTC yields the desired output:
inputFormatter.timeZone = TimeZone(identifier: "UTC") //01/01/2000
This bug occurs with other timezones too:
inputFormatter.timeZone = TimeZone(identifier: "Africa/Addis_Ababa")
inputFormatter.timeZone = TimeZone(identifier: "Europe/Moscow")
inputFormatter.timeZone = TimeZone(identifier: "Asia/Hong_Kong")
Basically all timezones that have GMT + hh:mm
Related
This question already has answers here:
How can I parse / create a date time stamp formatted with fractional seconds UTC timezone (ISO 8601, RFC 3339) in Swift?
(13 answers)
Swift - Get local date and time
(11 answers)
Closed 12 months ago.
I am struggling quite a bit with dates. I have the following code:
Current Date in Amsterdam: 22-Februari-2022 - 11:40
Current Date in New York: 22-Februari-2022 - 05:40
The dateBoughtString goes in as follows: 2022-02-18T19:50:47.081Z
The current date is just the current date.
let dateFormatterNew = DateFormatter()
dateFormatterNew.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'"
dateFormatterNew.timeZone = TimeZone(abbreviation: "GMT+1:00")
dateFormatterNew.locale = Locale(identifier: "nl-NL")
let dateBoughtTemp = dateFormatterNew.date(from: positionStatsString[0])!
print(dateBoughtTemp) // Prints: 2022-02-18 18:50:47 +0000
dateFormatterNew.timeZone = TimeZone(abbreviation: "GMT-5:00")
dateFormatterNew.locale = Locale(identifier: "en_US")
let dateNowTemp = dateFormatterNew.string(from: Date())
let dateBoughtTempTwo = dateFormatterNew.string(from: dateBoughtTemp)
print(dateNowTemp) // Prints: 2022-02-22T05:41:49.973Z
print(dateBoughtTempTwo) // Prints: 2022-02-18T13:50:47.081Z
let dateNow = dateFormatterNew.date(from: dateNowTemp)
let dateBought = dateFormatterNew.date(from: dateBoughtTempTwo)
print(dateNow!) // Prints: 2022-02-22 10:41:49 +0000 **INCORRECT**
print(dateBought!) // Prints: 2022-02-18 18:50:47 +0000 **INCORRECT**
When I convert to string all seems fine and it works as it should.
But when I convert those strings back to a date they just go back to Amsterdam time with the current date even being one hour off.
What am I missing here?
The problem is in your's parameter 'Z':
'' means that it's content doesn't involved in time formatting.
So when you apply timeZone parameter date is printed in particular time zone without correct timeZone suffix and when it's scanned it's scanned in particular time zone, just expecting that there will by Z character at the end. So when you are formatting to date and then to string you are accumulating error caused by timezone difference.
Correct format will be "yyyy-MM-dd'T'HH:mm:ss.SSSXXX" or better to use ISO8601DateFormatter because you can't set invalid format in it.
So your printed dates will have valid timezone suffix and timezone suffix will be considered in backward conversion.
Another moment: you shouldn't convert string back to date with localized formatter, if it's UI part, but for that you can use UIDatePicker instead of UITextField.
So full code will be:
let isoDateFormatter = ISO8601DateFormatter()
isoDateFormatter.formatOptions = [.withInternetDateTime, .withFractionalSeconds]
let date = isoDateFormatter.date(from: "2022-02-18T19:50:47.081Z")!
let now = Date()
do {
let amsterdamDateFormatter = DateFormatter()
amsterdamDateFormatter.timeZone = .init(abbreviation: "GMT+1:00")
amsterdamDateFormatter.dateStyle = .long
amsterdamDateFormatter.timeStyle = .short
print("now in Amsterdam: \(amsterdamDateFormatter.string(from: now))")
print("time in Amsterdam: \(amsterdamDateFormatter.string(from: date))")
}
do {
let newYourkDateFormatter = DateFormatter()
newYourkDateFormatter.timeZone = .init(abbreviation: "GMT-5:00")
newYourkDateFormatter.dateStyle = .long
newYourkDateFormatter.timeStyle = .short
print("now in NY: \(newYourkDateFormatter.string(from: now))")
print("time in NY: \(newYourkDateFormatter.string(from: date))")
}
Use the below code for formatter, Change the timezone and dateFormat according to your need:
let formatter = DateFormatter()
formatter.calendar = Calendar(identifier: .iso8601)
formatter.locale = Locale(identifier: "en_US_POSIX")
formatter.timeZone = TimeZone(secondsFromGMT: 0)
formatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSSXXXXX"
This question already has an answer here:
Swift ISO8601 format to Date returning fatal error
(1 answer)
Closed 1 year ago.
I think this is an ISO8601 formatted timestamp.
2021-07-05T22:26:51.159Z
I'm trying to convert it with ISO8601DateFormatter() in swift 5.
Here's what I've tried:
let dateFormatter = ISO8601DateFormatter()
dateFormatter.formatOptions = .withFullDate
//ISO8601DateFormatter().formatOptions = .withFractionalSeconds
let d = "2021-07-05T22:26:51.159Z"
let date = dateFormatter.date(from: d)
The result:
date = 2021-07-05 00:00:00 UTC
The day is correct, the time is not. I've tried to set the .withFractionalSeconds option. Didn't help.
How should I convert this format?
You can use standard date formatter to achieve this:
let dateFormatter = DateFormatter()
dateFormatter.locale = Locale(identifier: "en_US_POSIX")
dateFormatter.timeZone = TimeZone(secondsFromGMT: 0)
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSSZZZZZ"
let date = dateFormatter.date(from: d)
print(date)
This question already has answers here:
How can I parse / create a date time stamp formatted with fractional seconds UTC timezone (ISO 8601, RFC 3339) in Swift?
(13 answers)
Closed 3 years ago.
I am converting current date into GMT/UTC date string. But every time it returns me with wrong date.
My todays date is 07 February 2020, 11:09:20 AM. You can refer below image.
Here is my code :
let apiFormatter = DateFormatter()
//apiFormatter.dateStyle = DateFormatter.Style.long
//apiFormatter.timeStyle = DateFormatter.Style.long
//apiFormatter.calendar = Calendar.current
apiFormatter.timeZone = TimeZone.init(identifier: "GMT") //TimeZone(abbreviation: "UTC") //TimeZone.current //
//apiFormatter.locale = Locale.current
//apiFormatter.dateFormat = "yyyy-MM-DD HH:mm:ss"
apiFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'"
//apiFormatter.dateFormat = "yyyy-MM-dd'T'hh:mm:ssZ"
let endDate = apiFormatter.string(from: Date())
print(endDate)
And what I am getting in return is also you can check in image - 2020-02-38T05:33:34.598Z. I have tried with all the format, but no any luck. Can anyone suggest where it is going wrong?
First of all, the format should be:
apiFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSSZ"
The Z is not a literal letter, it's the description of the time zone. However, making it a literal won't probably make a problem.
The 38 for day from your output is obviously caused by the DD format you have commented out.
Nevertheless, you have to set the locale:
apiFormatter.locale = Locale(identifier: "en_US_POSIX")
Otherwise you will have problems with 12/24h switching.
let apiFormatter = DateFormatter()
apiFormatter.locale = Locale(identifier: "en_US_POSIX")
// remove this if you want to keep your current timezone (shouldn't really matter, the time is the same)
apiFormatter.timeZone = TimeZone(secondsFromGMT: 0)
apiFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSSZ"
let endDate = apiFormatter.string(from: Date())
print(endDate) // 2020-02-07T08:25:23.470+0000
print(Date()) // 2020-02-07 08:25:23 +0000
Also note that you can use ISO8601DateFormatter instead of DateFormatter.
Try this and adjust according to what format you are getting from server -
private func getFormatedDateInString(_ dateString: String) -> String? {
let dateFormatter = DateFormatter()
dateFormatter.locale = Locale(identifier: "en_US_POSIX")
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSSZ"
dateFormatter.timeZone = TimeZone(identifier: "UTC")
if let date = dateFormatter.date(from: dateString) {
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSSZ"
dateFormatter.timeZone = TimeZone.current
let timeStamp = dateFormatter.string(from: date)
return timeStamp
}
return nil
}
I'm getting this UTC time in string format from the server.."2019-12-18T10:58:40Z"
Now I want to convert it into local time. For that I referred this link. But it's not working..
What I wanted to achieve was to convert UTC time to local time and set a timer based on that time.
This is what I've tried..
var utcTime = "\(json["expirationDate"]!)"
self.dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'"
let date = self.dateFormatter.date(from: utcTime)
let utcDate = date?.toGlobalTime()
let localDate = utcDate?.toLocalTime()
But I'm getting nil values for the dates..
You don't have milliseconds in your UTC date string example. Your date format should be
self.dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss'Z'"
you have to change this format from
"yyyy-MM-dd'T'HH:mm:ss.SSS'Z'" to "yyyy-MM-dd'T'HH:mm:ss'Z'"**you have to
let utcTime = "2019-12-18T10:58:40Z"
let dateFormatter = DateFormatter.init()
dateFormatter.timeZone = TimeZone(abbreviation: "UTC")!
dateFormatter.locale = Locale(identifier: "en_US_POSIX")
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss'Z'"
let date = dateFormatter.date(from: utcTime)
print(date)
I have a date "2014-07-02 20:57:38 +0000" and I want to format it as "Today at 8:57 pm".
I want that if a string is yesterday, then display it as "Yesterday at 9:00 am". If it is neither today or yesterday, just show the actually date like "27/6 at 7:53 pm".
I was able to get the time with format like "8:57 AM" with the code below.
var formatter : NSDateFormatter = NSDateFormatter()
formatter.dateFormat = "h:mm a"
// message.createdAt is the date
let dateString = formatter.stringFromDate(message.createdAt)
println(dateString)
//output = 8:57 AM
However, when I use the following code, it returns a blank string.
var formatter : NSDateFormatter = NSDateFormatter()
formatter.dateFormat = "h:mm a"
formatter.doesRelativeDateFormatting = true //<-- This doesn't work
let dateString = formatter.stringFromDate(message.createdAt)
println(dateString)
//output = (nothing, its a blank string)
How do I make this work and display "Today" or "Yesterday" in Swift?
The reason it's blank is that your date format only has time components. Combined with .doesRelativeDateFormatting that gives you the empty string. If you want that custom time format, I think you need separate formatters for the date and the time:
let now = NSDate()
let dateFormatter = NSDateFormatter()
dateFormatter.dateStyle = .MediumStyle
dateFormatter.doesRelativeDateFormatting = true
let timeFormatter = NSDateFormatter()
timeFormatter.dateFormat = "h:mm a"
let time = "\(dateFormatter.stringFromDate(now)), \(timeFormatter.stringFromDate(now))"
println(time) // prints "Today, 5:10 PM"
With Swift 5.1, Apple Developer API Reference states about DateFormatter's dateFormat property:
You should only set this property when working with fixed format representations, as discussed in Working With Fixed Format Date Representations. For user-visible representations, you should use the dateStyle and timeStyle properties, or the setLocalizedDateFormatFromTemplate(_:) method if your desired format cannot be achieved using the predefined styles; both of these properties and this method provide a localized date representation appropriate for display to the user.
The following Playground sample code shows how to display your dates in the desired format using dateStyle, timeStyle and doesRelativeDateFormatting properties:
import Foundation
let now = Date() // 2019-08-09 12:25:12 +0000
let yesterday = Calendar.current.date(byAdding: .day, value: -1, to: now)! // 2019-08-08 12:25:12 +0000
let aWeekAgo = Calendar.current.date(byAdding: .weekOfMonth, value: -1, to: now)! // 2019-08-02 12:25:12 +0000
let dateFormatter = DateFormatter()
dateFormatter.dateStyle = .long
dateFormatter.timeStyle = .short
dateFormatter.doesRelativeDateFormatting = true
let nowString = dateFormatter.string(from: now)
print(nowString) // prints: Today at 2:25 PM
let yesterdayString = dateFormatter.string(from: yesterday)
print(yesterdayString) // prints: Yesterday at 2:25 PM
let aWeekAgoString = dateFormatter.string(from: aWeekAgo)
print(aWeekAgoString) // prints: August 2, 2019 at 2:25 PM
Give this a try in Swift:
let dateFormatter = DateFormatter()
dateFormatter.dateStyle = .short
dateFormatter.timeStyle = .short
dateFormatter.doesRelativeDateFormatting = true
let date = Date()
let dateString = dateFormatter.string(from:date)