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TimeZoneInfo.ConvertTimeFromUTC produce different output then TimeZone.BaseUTCOffset

I have a UTC date-time, I need to convert it to EST time zone. It should be as simple as this
var easternZone = TimeZoneInfo.FindSystemTimeZoneById("Eastern Standard Time");
var dt = DateTime.SpecifyKind(value, DateTimeKind.Utc);
return TimeZoneInfo.ConvertTimeFromUtc(dt, easternZone);
So my input date is
02-08-2019 22:53:32
and the result value is
02-08-2019 18:53:32
It deduct 4 hours from given time.
But if I check the Offset between Eastern Standard Time Zone and UTC time zone then the value it return is
easternZone.BaseUtcOffset {-05:00:00} System.TimeSpan
If this is true then above result value should be
02-08-2019 17:53:32
I am not sure what I am missing here.

I am not sure what I am missing here.
BaseUtcOffset does not take into account daylight saving time (it can't, since it doesn't know what specific date you are interested in). You likely want to use GetUtcOffset:
The returned time span includes any differences due to the application
of adjustment rules to the current time zone. It differs from the
BaseUtcOffset property, which returns the difference between
Coordinated Universal Time (UTC) and the time zone's standard time
and, therefore, does not take adjustment rules into account.
Adjustment Rule is discussed here (emphasis mine):
Provides information about a time zone adjustment, such as the
transition to and from daylight saving time.
As a general rule, if dates are ever <= 1 hour out from what you expect, look into daylight savings issues.
To illustrate the impact of daylight saving time:
var timeUtc = Convert.ToDateTime("01-01-2019 22:53:32");
var easternZone = TimeZoneInfo.FindSystemTimeZoneById("Eastern Standard Time");
var dt = DateTime.SpecifyKind(timeUtc, DateTimeKind.Utc);
Console.WriteLine(TimeZoneInfo.ConvertTimeFromUtc(dt, easternZone));
Console.WriteLine(easternZone.GetUtcOffset(dt));
timeUtc = Convert.ToDateTime("07-07-2019 22:53:32");
easternZone = TimeZoneInfo.FindSystemTimeZoneById("Eastern Standard Time");
dt = DateTime.SpecifyKind(timeUtc, DateTimeKind.Utc);
Console.WriteLine(TimeZoneInfo.ConvertTimeFromUtc(dt, easternZone));
Console.WriteLine(easternZone.GetUtcOffset(dt));
The above code will output:
1/1/2019 5:53:32 PM
-05:00:00
7/7/2019 6:53:32 PM
-04:00:00

Try This :
var timeUtc = Convert.ToDateTime("02-08-2019 22:53:32");
TimeZoneInfo easternZone = TimeZoneInfo.FindSystemTimeZoneById("Eastern Standard Time");
DateTime easternTime = TimeZoneInfo.ConvertTimeFromUtc(timeUtc, easternZone);
Console.WriteLine(easternTime);

Offset for UTC to Daylight Savings Time incorrect

I am trying to set a time to EST, and then find what it UCT time is. (We have our reasons).. I have read that "Eastern Standard Time" should take into account the Daylight savings time. But when we check the date, and we know it falls within Daylight Savings time, it still tries to convert for 5 hours instead of 4. Is there any method I am missing? Or do we have to do some manipulation.
DateTimeOffset convertDateTime = new DateTimeOffset(
subbmission.EntryDate,
TimeZoneInfo.FindSystemTimeZoneById("Eastern Standard Time").BaseUtcOffset);
I added the following bu the boss is not a fan of using this..so any ideas would be greatly appreciated.
if (zone.IsDaylightSavingTime(convertDateTime.DateTime))
{
currentDateTime = convertDateTime.DateTime.AddHours(-1);
}
else
{
currentDateTime = convertDateTime.DateTime;
}

Fundamentally, you're using the wrong approach - if you want to convert to UTC, use TimeZoneInfo.ConvertTimeToUtc(DateTime, TimeZoneInfo). You'll want to be careful around times that are either invalid (because they were skipped) or ambiguous (because the clock went back, and the same local time happened twice).
If you actually want a DateTimeOffset so that you can get both the local and UTC times, you could use call ConvertTimeToUtc then compute the difference between them. It's a shame that TimeZoneInfo doesn't appear to have a "construct a DateTimeOffset based on this DateTime in this time zone" but I can't see it...
As an alternative, you could use my Noda Time project which makes all of this a lot clearer, of course :)

To get the correct offset for a date in the timezone (with or without daylight saing time), i use something like
DateTimeOffset utcOffset = new DateTimeOffset(subbmission.EntryDate.ToUniversalTime(), TimeSpan.Zero);
var zone TimeZoneInfo.FindSystemTimeZoneById("Eastern Standard Time");
var correctOffset = zone.GetUtcOffset(utcOffset);

How to use Standard Time Only in TimezoneInfo.ConvertTime C#

I am having a Issue with the C# function of TimeZoneInfo.ConvertTime().
What i need to get is the Standard Time not the DST but i'm only getting DST is there a way to Tell the Function to only get the Result in Standard Time.
My local Timezone is UTC -6:00 Central America Standard Time, so if my time is 12:00 PM the Conversion i'm getting is throwing it at 2 PM Eastern Time but i need it to tell me it's 1:00 PM.
public static DateTime TimetoEst( DateTime timenow)
{
var currentTimeZone = TimeZone.CurrentTimeZone.GetUtcOffset(timenow).ToString();
var estzone = TimeZoneInfo.FindSystemTimeZoneById("Eastern Standard Time");
var conver = TimeZoneInfo.ConvertTime(timenow, estzone);
return conver;
}
Thanks

A couple of things:
The ID "Eastern Standard Time" represents both EST and EDT, with the appropriate transitions in place. It would more appropriately be called "Eastern Time", but alas this is the identifier and the convention used by Windows time zones.
The Eastern Time zone really does transition in and out of daylight saving time. If you were to always adjust to just Eastern Standard Time (UTC-5), you would be ignoring the reality of timekeeping in that region - that it is in Eastern Daylight Time (UTC-4) for dates in the summer months.
Your code will indeed return EST, but only for date values that are outside of the DST period.
Now, if you still think this is what you want to do - then you can do it without the TimeZoneInfo object at all. Simply adjust the result from the offset that applies to your source value, to the UTC-5 offset that applies to EST.
public static DateTime TimetoEst(DateTime timenow)
{
var dto = new DateTimeOffset(timenow); // will use .Kind to decide the offset
var converted = dto.ToOffset(TimeSpan.FromHours(-5));
return converted.DateTime;
}
This is what you asked, but for the record - I don't think this is the best plan. Besides the issues above - assuming that the input value should be interpreted based on the local time zone is not necessarily a good idea - and unless the input time has a .Kind of DateTimeKind.Utc, it will indeed use the computer's local time zone.
You did label the variable as timenow. If you are just after a DateTime which represents the current time in a fixed offset, then it's much safer just to get it like so:
DateTime dt = DateTimeOffset.UtcNow.ToOffset(TimeSpan.FromHours(-5)).DateTime;
And if you really want the current time in the Eastern Time zone, taking DST into account when appropriate, then:
DateTime dt = TimeZoneInfo.ConvertTimeBySystemTimeZoneId(DateTime.UtcNow,
"Eastern Standard Time");

How to tell if it's British Summer Time

I have the following code, which should return an offset of 60 (to show that in the UK at present, we are in British Summer Time - ie. 60 minutes ahead of GMT):
var info = TimeZoneInfo.FindSystemTimeZoneById("Greenwich Standard Time");
DateTimeOffset localServerTime = DateTimeOffset.Now;
double off = localServerTime.Offset.TotalMinutes;
return off;
However, it returns 0.
Could anyone please help fix this for me?

Use TimeZoneInfo.IsDaylightSavingTime Method (DateTimeOffset) to find if it is currently Daylight saving for your Timezone.
var info = TimeZoneInfo.FindSystemTimeZoneById("Greenwich Standard Time");
DateTimeOffset localServerTime = DateTimeOffset.Now;
bool isDaylightSaving = info.IsDaylightSavingTime(localServerTime);
There are further examples here

Your machine is not configured correctly if you get 0 and live in the UK. Probable causes are:
The machine's time zone is not set correctly. Click the clock on the taskbar to correct.
The machine is not configured to observe daylight savings. Click the clock.
The database that TimeZoneInfo consults for daylight savings rules in out of date or corrupted. It is stored in the HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones registry key.
Be careful about making radical changes, having it configured wrong might well have been done intentionally to work around some kind of flaw in a business-critical app that runs on the server. Talk to whomever administers the server first.

Another option is to use Noda Time.
The following code works with Noda Time 1.4 and higher:
var zone = NodaTime.TimeZones.TzdbDateTimeZoneSource.Default.ForId("Europe/London");
var zonedClock = NodaTime.SystemClock.Instance.InZone(zone);
var zonedDateTime = zonedClock.GetCurrentZonedDateTime();
bool isDST = zonedDateTime.IsDaylightSavingTime();
Console.WriteLine(isDST);
zone is a DateTimeZone object representing the UK's timezone, "Europe/London"
zonedClock is a ZonedClock object which represents, in this case, the system clock and the UK's timezone
zonedDateTime is a ZonedDateTime object representing the current date and time in the timezone ("the current instant provided by the underlying clock, adjusted to the time zone of this object")
isDST is a boolean indicating whether the current instant is in DST or not. At the time of writing (April 2018) this evaluates to true
With earlier versions of Noda where ZonedClock is not available, we can do this instead:
var zone = NodaTime.TimeZones.TzdbDateTimeZoneSource.Default.ForId("Europe/London");
var now = Instant.FromDateTimeOffset(DateTimeOffset.Now);
var zonedDateTime = new ZonedDateTime(now, zone);
bool isDST = zonedDateTime.IsDaylightSavingTime();

To master conversion from one timezone to anther you need to see what's supported (how?) and what's not.
foreach (var tz in TimeZoneInfo.GetSystemTimeZones())
{
Console.WriteLine("TimeZone Offset: {0} Name : {1}, Supports DLS: {2}", tz.BaseUtcOffset,tz.StandardName,tz.SupportsDaylightSavingTime);
}
This should give you the list all timezones including info about DayLightSaving.
Notice that:
TimeZone Offset: 00:00:00 Name : Greenwich Standard Time, Supports DLS: False
TimeZone Offset: 00:00:00 Name : GMT Standard Time, Supports DLS: True
So you need to use "GMT Standard Time" because it supports daylight saving already. No work needs to be done.
Here is sample code:
private static string GetBSTTimeStamp(string timestamp)
{
DateTime dt = DateTime.Parse(timestamp);
//TimeZoneInfo bst = TimeZoneInfo.FindSystemTimeZoneById("GMT Standard Time");
//Console.WriteLine("Time zone supports dls? {0}", bst.SupportsDaylightSavingTime);
//Console.WriteLine("Time zone offset? {0}", bst.BaseUtcOffset);
DateTime dateTimeInUtc = TimeZoneInfo.ConvertTimeBySystemTimeZoneId(dt, "Eastern Standard Time", "GMT Standard Time");
return dateTimeInUtc.ToString();
}

How I can convert UTC date to my time-zone?

I need to convert time to "UTC+03:30 Time Zone" in my web application here is UTC date :
DateTime dt = DateTime.UtcNow;
Is there any function to convert UTC to my time zone or not ? I don't want to involve myself writing a new function in my application if there is a function in ASP.NET.
The application might be hosted in different server in the world and that's exactly why I have used UTC date.
I need a function to add 3:30 to the current UTC time.

Are you sure your time zone is really UTC +3:30, all the time, with no daylight savings? If so, you could create a DateTimeOffset with the appropriate offset (3.5 hours). For example:
DateTimeOffset dtOffset = new DateTimeOffset(DateTime.UtcNow,
TimeSpan.FromHours(3.5));
Of course that gives you a DateTimeOffset instead of a DateTime... are you able to use that?
A better solution is to use TimeZoneInfo - for example, you could get the right time zone and call
DateTime local = TimeZoneInfo.ConvertTimeFromUtc(utcDateTime, tzInfo);
... or you could use TimeZoneInfo but still get a DateTimeOffset:
DateTimeOffset dto = TimeZoneInfo.ConvertTime(DateTimeOffset.UtcNow, tzInfo);
Personally I would recommend you use DateTimeOffset if you can, as the meaning of DateTime is somewhat ambiguous and hard to work with correctly.
.NET's date and time handling is a bit of a mess, unfortunately :( I have a project called Noda Time which should improve the state of affairs if we ever complete it, but it's far from production-ready at the moment.

this would let you convert UTC to any timezone
Shared Function FromUTC(ByVal d As Date, ByVal tz As String) As Date
Return (TimeZoneInfo.ConvertTimeBySystemTimeZoneId(d, TimeZoneInfo.Utc.Id, tz))
end function
you're able to get the list of timezones using
For Each timeZone As TimeZoneInfo In tzCollection
Console.WriteLine(" {0}: {1}", timeZone.Id, timeZone.DisplayName)
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