Why can t DateTime Parse parse UTC date

Question

Why can t it parse this   DateTime Parse  Tue  1 Jan 2008 00 00 00 UTC

User · Answer

You need to specify the format   DateTime date   DateTime ParseExact       Tue  1 Jan 2008 00 00 00 UTC         ddd  d MMM yyyy HH mm ss UTC        CultureInfo InvariantCulture

User · Answer

It s not a valid format  however  Tue  1 Jan 2008 00 00 00 GMT  is   The documentation says like this   A string that includes time zone information and conforms to ISO 8601  For example  the first of the following two strings designates the Coordinated Universal Time  UTC   the second designates the time in a time zone seven hours earlier than UTC   2008-11-01T19 35 00 0000000Z   A string that includes the GMT designator and conforms to the RFC 1123 time format  For example   Sat  01 Nov 2008 19 35 00 GMT  A string that includes the date and time along with time zone offset information  For example   03 01 2009 05 42 00 -5 00

User · Answer

I ve put together a utility method which employs all tips shown here plus some more       static private readonly string   MostCommonDateStringFormatsFromWeb              yyyy - MM - dd T hh mm ssZ           momentjs aka universal sortable with  T      2008-04-10T06 30 00Z          this is default format employed by moment   utc   format            yyyy - MM - dd T hh mm ss fffZ       syncfusion                                   2008-04-10T06 30 00 000Z      retarded string format for dates that syncfusion libs churn out when invoked by ejgrid for odata filtering and so on          O                                    iso8601                                      2008-04-10T06 30 00 0000000          s                                    sortable                                     2008-04-10T06 30 00          u                                    universal sortable                           2008-04-10 06 30 00Z             static public bool TryParseWebDateStringExactToUTC          out DateTime date          string input          string   formats   null          DateTimeStyles  styles   null          IFormatProvider formatProvider   null                     formats   formats    MostCommonDateStringFormatsFromWeb          return TryParseDateStringExactToUTC out date  input  formats  styles  formatProvider              static public bool TryParseDateStringExactToUTC          out DateTime date          string input          string   formats   null          DateTimeStyles  styles   null          IFormatProvider formatProvider   null                     styles   styles    DateTimeStyles AllowWhiteSpaces   DateTimeStyles AssumeUniversal   DateTimeStyles AdjustToUniversal    0 utc         formatProvider   formatProvider    CultureInfo InvariantCulture           var verdict   DateTime TryParseExact input  result  out date  style  styles Value  formats  formats  provider  formatProvider           if  verdict  amp  amp  date Kind    DateTimeKind Local    1                       date   date ToUniversalTime                       return verdict             0 employing adjusttouniversal is vital in order for the resulting date to be in utc when the  Z  flag is employed at the end of the input string             like for instance in   2008-04-10T06 30 000Z           1 local should never happen with the default settings but it can happen when settings get overriden   we want to forcibly return utc though         Notice the use of  -  and  T   single-quoted   This is done as a matter of best practice since regional settings interfere with the interpretation of chars such as  -  causing it to be interpreted as     or     or whatever your regional settings denote as date-components-separator  I have also included a second utility method which show-cases how to parse most commonly seen date-string formats fed to rest-api backends from web clients  Enjoy

User · Answer

or use the AdjustToUniversal DateTimeStyle in a call to  DateTime ParseExact String  String    IFormatProvider  DateTimeStyles

User · Answer

It can t parse that string because  UTC  is not a valid time zone designator   UTC time is denoted by adding a  Z  to the end of the time string  so your parsing code should look like this   DateTime Parse  Tue  1 Jan 2008 00 00 00Z      From the Wikipedia article on ISO 8601     If the time is in UTC  add a  Z    directly after the time without a   space   Z  is the zone designator for   the zero UTC offset   09 30 UTC  is   therefore represented as  09 30Z  or    0930Z    14 45 15 UTC  would be    14 45 15Z  or  144515Z        UTC time is also known as  Zulu  time    since  Zulu  is the NATO phonetic   alphabet word for  Z

User · Answer

Just use that   var myDateUtc   DateTime SpecifyKind DateTime Parse  Tue  1 Jan 2008 00 00 00    DateTimeKind Utc    if  myDateUtc Kind    DateTimeKind Utc         Console WriteLine  Yes  I am UTC         You can test this code using the online c  compiler   http   rextester com   I hope it helps

User · Answer

To correctly parse the string given in the question without changing it  use the following   using System Globalization   string dateString    Tue  1 Jan 2008 00 00 00 UTC   DateTime parsedDate   DateTime ParseExact dateString   ddd  d MMM yyyy hh mm ss UTC   CultureInfo CurrentCulture  DateTimeStyles AssumeUniversal     This implementation uses a string to specify the exact format of the date string that is being parsed  The DateTimeStyles parameter is used to specify that the given string is a coordinated universal time string

User · Answer

Not sure why  but you can wrap DateTime ToUniversalTime in a try   catch and achieve the same result in more code   Good luck

User · Answer

Assuming you use the format  o  for your datetime so you have  2016-07-24T18 47 36Z   there is a very simple way to handle this   Call DateTime Parse  2016-07-24T18 47 36Z   ToUniversalTime     What happens when you call DateTime Parse  2016-07-24T18 47 36Z   is you get a DateTime set to the local timezone  So it converts it to the local time    The ToUniversalTime   changes it to a UTC DateTime and converts it back to UTC time

User · Answer

Just replace  UTC  with  GMT  -- simple and doesn t break correctly formatted dates   DateTime Parse  Tue  1 Jan 2008 00 00 00 UTC  Replace  UTC    GMT

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