NSDateFormatter return nil NSDate for specify date strings

Question

Created Dec ’20

Replies 4

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I am trying to convert a string to date but NSDateFormatter returns nil for a specific date. In the code below all string are converted to Date except for date2 and date7. Any pointers as to what is wrong? Thanks

Code Block 			  let date1 = "Jan 01, 1941"
        let date2 = "Oct 01, 1941"
        let date3 = "Oct 13, 1941"
        let date4 = "Sep 30, 1941"
        let date5 = "Mar 31, 1941"
        let date6 = "Oct 02, 1941"
        let date7 = "Oct 01, 1941"
        
        let dateStringFormatter = DateFormatter()
        dateStringFormatter.dateFormat = "MMM dd, yyyy" //Using custom
        dateStringFormatter.locale = Locale(identifier: "en_US_POSIX")
        let date_1 : Date? = dateStringFormatter.date(from: date1)
        let date_2 : Date? = dateStringFormatter.date(from: date2)
        let date_3 : Date? = dateStringFormatter.date(from: date3)
        let date_4 : Date? = dateStringFormatter.date(from: date4)
        let date_5 : Date? = dateStringFormatter.date(from: date5)
        let date_6 : Date? = dateStringFormatter.date(from: date6)
        let date_7 : Date? = dateStringFormatter.date(from: date7)
        print("\(String(describing: date_1)),\n\(String(describing: date_2)),\n\(String(describing: date_3)),\n\(String(describing: date_4)),\n\(String(describing: date_5)),\n\(String(describing: date_6)),\n\(String(describing: date_7))")

Boost

Answer 1

OOPer OP

Dec ’20

In my environment, none of the dates generates nil. What is the default timezone of your environment?

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Answer 2

Claude31 OP

Dec ’20

No problem either in Playground.

I get the following print:

Optional(1940-12-31 22:00:00 +0000),
Optional(1941-09-30 22:00:00 +0000),
Optional(1941-10-12 22:00:00 +0000),
Optional(1941-09-29 22:00:00 +0000),
Optional(1941-03-30 22:00:00 +0000),
Optional(1941-10-01 22:00:00 +0000),
Optional(1941-09-30 22:00:00 +0000)

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Answer 3

RakeshPatole OP

Dec ’20

Yes, changing time zone to US does work, My Time Zone is Indian Standard Time GMT+5:30.

0

Answer 4

DTS Engineer OP

Apple

Dec ’20

I haven’t dug into this in detail but I suspect you’re hitting the problem described in Parsing Dates Without Times.

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