using System;

using System.Globalization;

using System.Collections;

​

public class Program

{

    public static void Main()

    {

        Hashtable timezoneLookup = GetTimeZoneAbbreviationLookup();

        string dateString, format;

        DateTime result;

        CultureInfo provider = CultureInfo.CurrentCulture;

        // Example input: 'Wed Jan 11 08:37:19 CEST 2017'

        dateString = "Wed Jan 11 08:37:19 CEST 2017";

        string[] stzElements = dateString.Split(' '); // expecting 6 fields

        // replace timezone abbreviation with the utc offset

        stzElements[4] = (string)timezoneLookup[stzElements[4]];

        // select proper timezone format, zzz if minutes are specified, zz otherwise

        if (stzElements[4].Contains(":"))

        {

            format = "ddd MMM dd hh:mm:ss zzz yyyy";

        }

        else

        {

            format = "ddd MMM dd hh:mm:ss zz yyyy";

        }

​

        dateString = string.Join(" ", stzElements);

        try

        {

            result = DateTime.ParseExact(dateString, format, provider);

            Console.WriteLine("{0} converts to {1} via format {2}.", dateString, result.ToString(), format);

        }

        catch (FormatException)

        {

            Console.WriteLine("{0} is not in the correct format.", dateString);

        }

    }

​

    static Hashtable GetTimeZoneAbbreviationLookup()

    {

        Hashtable hashtable = new Hashtable();

        String sInput = "ACDT;UTC+10:30|ACST;UTC+09:30|ACT;UTC+08|ADT;UTC-03|AEDT;UTC+11|AEST;UTC+10|AFT;UTC+04:30|AKDT;UTC-08|AKST;UTC-09|AMST;UTC-03|AMT;UTC-04|ART;UTC-03|AST;UTC-04|AWDT;UTC+09|AWST;UTC+08|AZOST;UTC-01|AZT;UTC+04|BDT;UTC+08|BIOT;UTC+06|BIT;UTC-12|BOT;UTC-04|BRT;UTC-03|BST;UTC+01|BTT;UTC+06|CAT;UTC+02|CCT;UTC+06:30|CDT;UTC-05|CEDT;UTC+02|CEST;UTC+02|CET;UTC+01|CHADT;UTC+13:45|CHAST;UTC+12:45|CHOT;UTC+08|ChST;UTC+10|CHUT;UTC+10|CIST;UTC-08|CIT;UTC+08|CKT;UTC-10|CLST;UTC-03|CLT;UTC-04|COST;UTC-04|COT;UTC-05|CST;UTC-06|CT;UTC+08|CVT;UTC-01|CWST;UTC+08:45|CXT;UTC+07|DAVT;UTC+07|DDUT;UTC+10|DFT;UTC+01|EASST;UTC-05|EAST;UTC-06|EAT;UTC+03|ECT;UTC-04|EDT;UTC-04|EEDT;UTC+03|EEST;UTC+03|EET;UTC+02|EGST;UTC+00|EGT;UTC-01|EIT;UTC+09|EST;UTC-05|FET;UTC+03|FJT;UTC+12|FKST;UTC-03|FKT;UTC-04|FNT;UTC-02|GALT;UTC-06|GAMT;UTC-09|GET;UTC+04|GFT;UTC-03|GILT;UTC+12|GIT;UTC-09|GMT;UTC|GST;UTC+04|GYT;UTC-04|HADT;UTC-09|HAEC;UTC+02|HAST;UTC-10|HKT;UTC+08|HMT;UTC+05|HOVT;UTC+07|HST;UTC-10|ICT;UTC+07|IDT;UTC+03|IOT;UTC+03|IRDT;UTC+04:30|IRKT;UTC+08|IRST;UTC+03:30|IST;UTC+05:30|JST;UTC+09|KGT;UTC+06|KOST;UTC+11|KRAT;UTC+07|KST;UTC+09|LHST;UTC+11|LINT;UTC+14|MAGT;UTC+12|MART;UTC-09:30|MAWT;UTC+05|MDT;UTC-06|MET;UTC+01|MEST;UTC+02|MHT;UTC+12|MIST;UTC+11|MIT;UTC-09:30|MMT;UTC+06:30|MSK;UTC+03|MST;UTC-07|MUT;UTC+04|MVT;UTC+05|MYT;UTC+08|NCT;UTC+11|NDT;UTC-02:30|NFT;UTC+11:30|NPT;UTC+05:45|NST;UTC-03:30|NT;UTC-03:30|NUT;UTC-11|NZDT;UTC+13|NZST;UTC+12|OMST;UTC+06|ORAT;UTC+05|PDT;UTC-07|PET;UTC-05|PETT;UTC+12|PGT;UTC+10|PHOT;UTC+13|PKT;UTC+05|PMDT;UTC-02|PMST;UTC-03|PONT;UTC+11|PST;UTC-08|PYST;UTC-03|PYT;UTC-04|RET;UTC+04|ROTT;UTC-03|SAKT;UTC+11|SAMT;UTC+04|SAST;UTC+02|SBT;UTC+11|SCT;UTC+04|SGT;UTC+08|SLST;UTC+05:30|SRET;UTC+11|SRT;UTC-03|SST;UTC-11|SYOT;UTC+03|TAHT;UTC-10|THA;UTC+07|TFT;UTC+05|TJT;UTC+05|TKT;UTC+13|TLT;UTC+09|TMT;UTC+05|TOT;UTC+13|TVT;UTC+12|UCT;UTC|ULAT;UTC+08|USZ1;UTC+02|UTC;UTC|UYST;UTC-02|UYT;UTC-03|UZT;UTC+05|VET;UTC-04:30|VLAT;UTC+10|VOLT;UTC+04|VOST;UTC+06|VUT;UTC+11|WAKT;UTC+12|WAST;UTC+02|WAT;UTC+01|WEDT;UTC+01|WEST;UTC+01|WET;UTC|WIT;UTC+07|WST;UTC+08|YAKT;UTC+09|YEKT;UTC+05|Z;UTC";

        string[] timezones = sInput.Split('|');

        string[] tzValuePair;

        foreach (string timezone in timezones)

        {

            // Value pair example: ACDT;UTC+10:30

            tzValuePair = timezone.Split(';');

            // Console.WriteLine (timezone);

            // Remove UTC from the value

            hashtable.Add(tzValuePair[0], tzValuePair[1].Substring(3));

        }

​

        return hashtable;

    }

}