CODEWITHSUNDEEP
c#nodatime
Praveen Patel G
Praveen Patel G

Reputation: 362

NodaTime IANA TimeZone Offsets not matching in C#

Date to convert : 12/10/2016 12:00:00 AM Time zone to convert : America/New_York

This is my function to return offset of the date (dt) I provide.

LocalDateTime fromLocal = LocalDateTime.FromDateTime(dt);
DateTimeZone fromZone = DateTimeZoneProviders.Tzdb[timeZone];
ZonedDateTime fromZoned = fromLocal.InZoneLeniently(fromZone);

return fromZoned.ToDateTimeOffset();

Result : 2016-12-10T00:00:00 America/New_York (-05)

When I google offset for America/New_York, I get -04 as offset.

Please help if anybody knows why this is happening.

Upvotes: 1

Views: 107

Answers (1)

Jon Skeet
Jon Skeet

Reputation: 1500805

When I google offset for America/New_York, I get -04 as offset.

That would be true in the summer (and in particular it's the current offset at the time of your question), but not the winter (which would include 2016-12-10 - your "12/10/2016" is ambiguous in terms of whether it's in December or October).

America/New_York observes UTC-5 in winter, and UTC-4 in summer.

There's no bug here.

Upvotes: 3

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