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String was not recognized as a valid DateTime format dd/MM/yyyy [duplicate]

This question already has answers here:
DateTime ParseExact string was not recognize as a DateTime C#
(2 answers)
Closed 5 years ago.
string d = "4/2/2018 12:00:00 AM";// 2nd April 2018
DateTime startD;
startD = DateTime.ParseExact(d, "MM/dd/yyyy", CultureInfo.InvariantCulture);
How can I get the string recognized as a valid DateTime?

Its called ParseExact for a reason.
Use "M/d/yyyy hh:mm:ss tt"
See https://learn.microsoft.com/en-us/dotnet/standard/base-types/custom-date-and-time-format-strings for the custom date time specifiers and DateTime.ParseExact
Alternatively you could swith to DateTime.TryParse(...) Syntax which I would prefere unless you are 100% certain what your input is.

As Patrick Artner noted, your pattern does not match your format.
The correct format is "M/d/yyyy hh:mm:ss tt" with
M ... Represents the month as a number from 1 through 12.
d ... Represents the day of the month as a number from 1 through 31

string d = "4/2/2018 12:00:00 AM";// 2nd April 2018
DateTime startD;
startD = Convert.ToDateTime(d);

How to parse custom string to DateTime C#?

I need to parse to following Date Aug 20 11:38:43 2017 GMT
I'm trying to use DateTime.TryParseExact but can't find the correct format.
my latest format is MMM dd hh:mm:ss yyyy
my code :
string nextUpdate; //Next Update: Aug 20 11:38:43 2017 GMT
string dateTimeFormat = "MMM dd hh:mm:ss yyyy";
DateTime crldt;
DateTime.TryParseExact(nextUpdate.Split(':')[1].Trim(), dateTimeFormat, System.Globalization.CultureInfo.InvariantCulture, System.Globalization.DateTimeStyles.None, out crldt);
when I run the code I get crldt ~ Date = {1/1/01 12:00:00 AM}
my question : what format should I use or what alternative way can I use to parse this string to DateTime
UPDATE
using suggestions from : #Sergey Berezovskiy
I've updated the code to :
string nextUpdate; // Next Update: Oct 7 06:16:18 2017 GMT
string dateTimeFormat = #"MMM dd HH:mm:ss yyyy \G\M\T";
Regex r =new Regex(".*Next Update:.*");
nextUpdate = r.Match(Crltext).Value;
DateTime crldt;
DateTime.TryParseExact(nextUpdate.Substring(nextUpdate.IndexOf(':')+1).Trim(),
dateTimeFormat, System.Globalization.CultureInfo.InvariantCulture,
System.Globalization.DateTimeStyles.AssumeUniversal, out crldt);
int intDTComp = DateTime.Compare(crldt, DT_now);
I've found a date that doesn't fit this format : Next Update: Oct 7 06:16:18 2017 GMT
what is the issue now ?
UPDATE 2
I've found the issue , but can't find a clean solution.
The issue is that the problematic date is Oct 7 ... ,
while the format is MMM dd ...
my workaround is adding another format MMM d hh:mm:ss yyyy and using it if date = {1/1/01 12:00:00 AM}
what other solution may I use in this scenario

First of all, don't forget that your string contains "GMT". You should either remove it from the string, or add to format pattern:
string nextUpdate = "Next Update: Aug 20 11:38:43 2017 GMT";
string format = #"MMM dd hh:mm:ss yyyy \G\M\T";
Next - don't split input string by : because there is another : symbols in the string. And you will get array with parts ["Next Update", " Aug 20 11", "38", "43 2017 GMT"]. Taking the second item from array gives you " Aug 20 11". Instead, you should just take substring after first : occurance:
string s = nextUpdate.Substring(nextUpdate.IndexOf(':') + 1).Trim();
And finally parse that string using your format:
IFormatProvider provider = CultureInfo.InvariantCulture;
DateTime date = DateTime.ParseExact(s, format, provider, DateTimeStyles.AssumeUniversal);
Output will depend on your time zone. E.g. for my time zone GMT+3 it will be:
8/20/2017 14:38:43

If this is your string:
"Next Update: Aug 20 11:38:43 2017 GMT"
Then when you do this:
nextUpdate.Split(':')[1].Trim()
You get this:
"Aug 20 11"
Which doesn't match your date format. I suspect you don't just want the second split value, but also all remaining split values. You can re-join them. Something like this:
string.Join(":", nextUpdate.Split(':').Skip(1)).Trim()
This would split them by the ":" character, skip the first one but keep all remaining ones, and re-join the remaining ones into another string with the ":" character again.
Note: You may also need to account for that time zone value. There are some helpful ideas on this question for how to do that.

If that's the input, I propose that you take the format exactly as the input
string nextUpdate = "Next Update: Aug 20 11:38:43 2017 GMT";
string dateTimeFormat = #"\N\e\x\t\ \U\p\d\a\t\e\:\ MMM dd hh:mm:ss yyyy\ \G\M\T";
DateTime crldt;
crldt = DateTime.ParseExact(nextUpdate, dateTimeFormat , System.Globalization.CultureInfo.InvariantCulture, System.Globalization.DateTimeStyles.None);
This way, when reading the code it's very clear what the expected format is, and you don't have code with Split() or other items that need explanation.
Also note that if you leave the colons (:) like that, they may be replaced by .NET to match the hour separator. Use \: if you always require a literal colon.
As I wrote in the comments before, note that you're ignoring the time zone.

Use following code
CultureInfo provider = CultureInfo.InvariantCulture;
DateTime givenDate = DateTime.ParseExact("Aug 20 14:38:43 2017 GMT", "MMM dd HH:mm:ss yyyy GMT", provider); // here HH is for 24 hour format . use hh for 12 hour format
string expectedDate = givenDate.ToString("dd/MM/yy hh:mm:ss tt"); // tt is for AM or PM (no need to use tt if you use hour as HH I mean 24 hour format)
Your Output will be 20/08/17 11:38:43 AM

Why is this DateTime.ParseExact call failing? [duplicate]

This question already has answers here:
Parse DateTime with time zone of form PST/CEST/UTC/etc
(6 answers)
Closed 6 years ago.
var dateValue = "Mon, 02 May 2016 12:00 PM EDT";
var date = DateTime.ParseExact(
dateValue,
"ddd, dd MMM yyyy hh:mm tt K",
System.Globalization.CultureInfo.InvariantCulture);
As near as I can tell, from the official format string documentation, this should work. Instead, it raises System.FormatException with the rather unhelpful message: String was not recognized as a valid DateTime.
Is there any way to figure out what's going wrong?

The K Custom Format Specifier does not accept time zone strings.
If you can supply the hour offset instead of a string, then you can use "z".
var dateValue = "Mon, 02 May 2016 12:00 PM -4";
var date = DateTime.ParseExact(
dateValue,
"ddd, dd MMM yyyy hh:mm tt z",
System.Globalization.CultureInfo.InvariantCulture);

https://msdn.microsoft.com/en-us/library/shx7s921%28v=vs.110%29.aspx specifies that the DateTime.Kind enumeration has 3 members. So perhaps it does not like you to specify "EDT" as a kind.
Member name Description
Local The time represented is local time.
Unspecified The time represented is not specified as either local time or Coordinated Universal Time (UTC).
Utc The time represented is UTC.

This should work
var dateValue = "Mon, 02 May 2016 12:00 PM EDT".Replace("EDT", "-4");
var date = DateTime.ParseExact(
dateValue,
"ddd, dd MMM yyyy hh:mm tt z",
System.Globalization.CultureInfo.InvariantCulture);

Converting string with month that is not integer to datetime [duplicate]

This question already has answers here:
datetime.parse and making it work with a specific format
(2 answers)
Closed 9 years ago.
I have strings in the format
Mar 25 2013 6:30PM
and I want to convert them to datetime objects in the format
2013-03-25 18:30:00
how would I go about doing this?

Try this
DateTime dt
CultureInfo provider = CultureInfo.InvariantCulture;
System.Globalization.DateTimeStyles style = DateTimeStyles.None;
DateTime.TryParseExact("Mar 25 2013 6:30PM", "MMM d yyyy h:mtt", provider, style, out dt);

you can use:
var date = DateTime.Parse("Mar 25 2013 6:30PM");
Console.WriteLine(date.ToString()); /*This will output the date in the required format */

Parse DateTime From Odd Format [duplicate]

This question already has an answer here:
Closed 10 years ago.
Possible Duplicate:
Parsing a complicated string as DateTime
I have a string date with time that I'd like to parse into a DateTime. I'm not quite sure how to tackle it because of the odd format. Help is appreciated.
Example: Mon Mar 24 13-42-30 2008

DateTime.ParseExact should do what you want:
var dateTime = DateTime.ParseExact(
"Mon Mar 24 13-42-30 2008",
"ddd MMM dd HH-mm-ss yyyy",
CultureInfo.CurrentCulture);
Can someone tell me the difference between using CultureInfo.CurrentCulture and CultureInfo.InvariantCulture, like the other answers? I was assuming things like the day name and month name might need to be parsed in their native language. Thanks.

Try:
var theDate = DateTime.ParseExact(
"Fri Jul 13 13-42-30 2012",
"ddd MMM dd HH-mm-ss yyyy",
System.Globalization.CultureInfo.InvariantCulture);
Date string formatting options can be found here.

That format doesn't seem all that odd, but you could probably easily handle it by using DateTime.ParseExact(). Of course, it assumes that the format remains the same.

try this way please
string format ="ddd MMM dd hh-mm-ss yyyy";
DateTime dt = DateTime.ParseExact(format, dateString, CultureInfo.InvariantCulture);