getting nil date from string using formatter

Question

I'm using this code for converting array of String date into Date

let formatter = DateFormatter()
formatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss"
for i in 0 ..< data.count {
     let time = data[i]
     let ft_date = time["ft_date"] as! String
     print(ft_date)
     let dateF = formatter.date(from: ft_date)
     print(dateF)
}

and it's the output of console

2017-04-09T00:00:00
Optional(2017-04-08 19:30:00 +0000)
2017-04-08T00:00:00
Optional(2017-04-07 19:30:00 +0000)
2017-04-05T00:00:00
Optional(2017-04-04 19:30:00 +0000)
2017-04-01T00:00:00
Optional(2017-03-31 19:30:00 +0000)
2017-04-01T00:00:00
Optional(2017-03-31 19:30:00 +0000)
2017-04-01T00:00:00
Optional(2017-03-31 19:30:00 +0000)
2017-03-22T00:00:00
nil

why this is happening? it's the same format but I'm getting nil

I'm confused too it's correct logically but happening @Sweeper — Amir_P, May 09 '17 at 06:33
We can reproduce this by setting the timeZone like formatter.timeZone = TimeZone(abbreviation: "IRST").....here IRST is an abbreviation for Iran standard time, if we set the timeZone to Iran Daylight time("IRDT") issue is not reproducible. — user3608500, May 09 '17 at 06:50
so if set it to `IRDT` it will not happen again? on any other date? @user3608500 — Amir_P, May 09 '17 at 07:01
See [1st april dates of 80s failed to parse in iOS 10.0](http://stackoverflow.com/questions/40284272/1st-april-dates-of-80s-failed-to-parse-in-ios-10-0) (duplicate?) for a similar issue and a possible solution. — Martin R, May 09 '17 at 07:03

vadian · Accepted Answer · 2017-05-09T07:13:45.017

3

Are you living in a country where daylight saving time changes on 2017-03-22 at midnight?

If yes this could be the reason because the date does not exist.

edited May 09 '17 at 07:13

answered May 09 '17 at 06:37

vadian

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I'm living in Iran and it's not changing on `2017-03-22` but how can I fix it? – Amir_P May 09 '17 at 06:38
According to [timeanddate.com](https://www.timeanddate.com/time/change/iran) it does change on `2017-03-22` in Iran – vadian May 09 '17 at 06:41
oh you're right. what should I do? – Amir_P May 09 '17 at 06:41
Daylight starts on 22 March 2017 in Iran as linked [here](https://www.timeanddate.com/time/change/iran/tehran). [This](http://stackoverflow.com/a/34533387/3581421) answer may help you. – ridvankucuk May 09 '17 at 06:42
my date is String so I can't use `isDaylightSavingTimeForDate` because it gets a `NSDate` – Amir_P May 09 '17 at 06:51

KKRocks · Answer 2 · 2017-05-09T06:43:35.867

0

You need to change time Format ;

formatter.dateFormat = "yyyy-MM-dd HH:mm:ss Z"

edited May 09 '17 at 06:43

answered May 09 '17 at 06:29

KKRocks

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how do u say this `yyyy-MM-dd HH:mm:ss Z` is equilant to `2017-03-22T00:00:00` returns nil – Anbu.Karthik May 09 '17 at 06:30
@Amir_P - i am not seen any change for your date format – Anbu.Karthik May 09 '17 at 06:31
what you mean? @Anbu.Karthik – Amir_P May 09 '17 at 06:33
@Amir_P - i said every thing is correct, check once your code again – Anbu.Karthik May 09 '17 at 06:34
the format you said is not working – Amir_P May 09 '17 at 06:37
I checked it many times but it's not working @Anbu.Karthik – Amir_P May 09 '17 at 06:37

getting nil date from string using formatter

2 Answers2