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How Do I Convert IANA zone + datetime to UTC + Offset using NodaTime


How Do I Convert IANA zone + datetime to UTC + Offset using NodaTime

By : ctoppel
Date : November 21 2020, 07:31 AM
it should still fix some issue It's unclear from your question if you meant that the original value was in UTC or in local time.
If it's in UTC, then do the following:
code :
string dateTime = "2014-12-31 12:30:00";
string timeZone = "Europe/London";

var pattern = InstantPattern.CreateWithInvariantCulture("yyyy-MM-dd HH:mm:ss");
Instant instant = pattern.Parse(dateTime).Value;
ZonedDateTime zdt = instant.InZone(DateTimeZoneProviders.Tzdb[timeZone]);
string output = zdt.ToString("yyyy-MM-dd HH:mm:sso<m>", CultureInfo.InvariantCulture);
string dateTime = "2014-12-31 12:30:00";
string timeZone = "Europe/London";

var pattern = LocalDateTimePattern.CreateWithInvariantCulture("yyyy-MM-dd HH:mm:ss");
LocalDateTime ldt = pattern.Parse(dateTime).Value;
ZonedDateTime zdt = ldt.InZoneLeniently(DateTimeZoneProviders.Tzdb[timeZone]);
string output = zdt.ToString("yyyy-MM-dd HH:mm:sso<m>", CultureInfo.InvariantCulture);


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Convert DateTime from specific time zone to UTC using Nodatime?

Convert DateTime from specific time zone to UTC using Nodatime?


By : user3499292
Date : March 29 2020, 07:55 AM
Hope that helps
What I am confused about is how to create a Nodatime variable for a specific time zone at a specific date/time?
code :
LocalDateTime local = new LocalDateTime(2015, 4, 17, 8, 0, 0);
DateTimeZone zone = DateTimeZoneProviders.Tzdb["America/Los_Angeles"];
ZonedDateTime zonedTime = local.InZoneLeniently(zone);
Convert datetime to string always defaults to system time zone offset, Need to get the users timezone offset in the resu

Convert datetime to string always defaults to system time zone offset, Need to get the users timezone offset in the resu


By : PershinDmitriy
Date : March 29 2020, 07:55 AM
hope this fix your issue I have a code where the user enters the DateTime and the timezone in which the dates needs to be converted to and the format in which the end date should be. Below is the code. , You can use DateTimeOffset instead of DateTime to handle this:
code :
            DateTimeOffset time = DateTime.Now;
            string timezoneID = "Pacific Standard Time";
            TimeZoneInfo info = TimeZoneInfo.FindSystemTimeZoneById(timezoneID);

            DateTimeOffset newTIme = TimeZoneInfo.ConvertTime(time, info);


            string timeformat = newTIme.ToString("yyyy-MM-dd HH:mm:ss \"GMT\"zzz");
            string oldtimeformat = time.ToString("yyyy-MM-dd HH:mm:ss \"GMT\"zzz");
How to get all IANA Timezones from an offset in NodaTime?

How to get all IANA Timezones from an offset in NodaTime?


By : Hazel Coder
Date : March 29 2020, 07:55 AM
Any of those help You could try the following:
First create a dictionary with all the offsets and the timezones belonging to that offset
code :
Instant now = SystemClock.Instance.Now;
IDateTimeZoneProvider timeZoneProvider = DateTimeZoneProviders.Tzdb;
Dictionary<TimeSpan, List<string>> timezonesForOffset = new Dictionary<TimeSpan, List<string>>();
foreach(var id in timeZoneProvider.Ids){
    ZonedDateTime zdt = now.InZone(timeZoneProvider[id]);
    var timespan = zdt.Offset.ToTimeSpan();
    if(timezonesForOffset.ContainsKey(timespan)){
        timezonesForOffset[timespan].Add(id);
    } else {
        timezonesForOffset[timespan] = new List<string> {id, };
    }
}
var timespan2 = new TimeSpan(1,0,0);
var timezonesWithOffset = timezonesForOffset[timespan2];

var usersinTimezone = db.Users.Where(x=> timezonesWithOffset.Contains(x.TimezoneId)).ToList();
How can I convert IANA time zone name to UTC offset at present in Ubuntu C/C++

How can I convert IANA time zone name to UTC offset at present in Ubuntu C/C++


By : Megha Vasudeva Rao
Date : March 29 2020, 07:55 AM
will help you You alluded to this fact, but it's important to note that the offset between UTC and the time in a time zone is not necessarily constant. If the time zone performs daylight saving (summer) time adjustments, the offset will vary depending on the time of year.
One way to find the offset is to take the time you're interested in, hand it to the localtime() function, then look at the tm_gmtoff field. Do this with the TZ environment variable set to the zone name you're interested in. Here's an example that does so for the current time:
code :
#include <time.h>
#include <stdio.h>

int main()
{
    setenv("TZ", "America/Los_Angeles", 1);
    time_t t = time(NULL);
    struct tm *tmp = localtime(&t);
    printf("%ld\n", tmp->tm_gmtoff);
}
    timezone_t tz = tzalloc("America/Los_Angeles");
    if(tz == NULL) return 1;
    time_t t = time(NULL);
    struct tm tm, *tmp = localtime_rz(tz, &t, &tm);
    printf("%ld\n", tmp->tm_gmtoff);
How to get time zone offset from IANA time zone code in JavaScript?

How to get time zone offset from IANA time zone code in JavaScript?


By : herson Ramos
Date : March 29 2020, 07:55 AM
wish helps you I figured it out how to get time zone offset from IANA time zone code in javascript. I have used moment-timezone-with-data.js as below
code :
var zone = moment.tz.zone('Asia/Kolkata');
zone.parse(Date.UTC(2012, 2, 19, 8, 30)); // -330
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