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Questions tagged [nodatime]

Noda Time is a .NET library designed to simplify the correct handling of dates and times in the .NET environment.

Noda Time is an alternative date and time API for .NET. It helps you to think about your data more clearly, and express operations on that data more precisely.

It borrows many concepts from Joda Time, the industry standard date and time handling library for Java. It is an idiomatic port - not a direct translation. It has been specifically tailored for use in the .Net Framework.

There are many reasons to use Noda Time instead of the normal BCL date and time types, including:

  • Support for IANA/Olson time zones such as America/New_York.

  • Distinct representations of different concepts: Instead of using DateTime to represent everything, there are different types for dates, times, values with time zones, values with just UTC offsets, etc.

  • Reduced surprise: All Noda Time types work consistently in a predictable manner. By contrast, the DateTime type has different behaviors depending on its Kind property. For examples of the type of surprises that are avoided, read "What's Wrong with DateTime Anyway?"

  • Testability: You can easily mock the system clock using the IClock interface, and you have to go out of your way if you want to be affected by the computer's local time zone. By contrast, DateTime.Now is difficult to mock, and is bound to the system time zone by default.

Noda Time also has the ability to work with Windows time zones, and can convert between them. It also contains zone.tab data, which can be used to correlate time zones with a country code, or locate time zones on a map.

Resources:

The primary author of Noda Time is Jon Skeet, of Stack Overflow fame.

See also:

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How to translate between Windows and IANA time zones?

As described in the timezone tag wiki, there are two different styles of time zones. Those provided by Microsoft for use with Windows and the .Net TimeZoneInfo class (when running on Windows) are identified by a value such as "Eastern Standard…
Matt Johnson-Pint
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Instant.Now for NodaTime

I'm trying to get a handle on using the Noda Time framework by Jon Skeet (and others). I'm trying to store the current now(Instant). Instant is created from a long ticks, but what is the current now count of Ticks? Is it: Instant now = new…
Chuck Savage
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How can NodaTime be used with EF Code First?

I really want to be able to use NodaTime in my Entity Framework Code First database projects but haven't found a "clean" way to do it. What I really want to do is this: public class Photoshoot { public Guid PhotoshootId{get; set;} public…
smalltowndev
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DateTime.Now and Culture/Timezone specific

Our application was designed to handle user from different Geographic location. We are unable to detect what is the current end user local time and time zone operate on it. They select different culture like sv-se, en-us, ta-In even they…
Billa
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How does DateTimeOffset deal with daylight saving time?

I am storing schedules in the database as a day of the week, hour and minute. When the data is read we create a DateTime object for the next occurrence of that day, hour and minute, but I need to modify this to be DST-aware. I am able to modify the…
Stephen Kennedy
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How should I persist timestamps in SQL DB if app uses NodaTime?

I want to start using NodaTime in my application to manage times, instants and general time localization. Sometimes I persist timestamps to a SQL Server 2008 database. I had traditionally used datetime2 fields in UTC. These timestamps will be…
Matthew
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Converting between time zones with Noda Time

I'm currently trying to ensure that our legacy back-end can support resolving date times based on the user's current time zone (or, more specifically offset). Our servers are in eastern standard time, and most of our date times originate there. …
PureCognition
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Create a NodaTime LocalDate representing "today"

What is the recommended way to create a LocalDate instance that represents "today". I was expecting there to be a static "Now" or "Today" property in the LocalDate class, but there isn't. My current approach is to use DateTime.Now: var now =…
Redbaran
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Getting the system's LocalDateTime in Noda Time

What is the idiomatic way to get the system's time as a LocalDateTime in Noda Time? The most direct method I could think of would be var dt = DateTime.Now LocalDateTime systemTime = new LocalDateTime(dt.Year, dt.Month, dt.Day, dt.Hour,…
Matt Kline
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How to parse an ISO string value to a NodaTime Instant?

I am getting to know NodaTime and like it a lot. But I don't know it that well (yet)! Given a value such as '2014-04-08T09:30:18Z', what are the steps required to parse such a string to a NodaTime Instant? Thank you!
ivnext
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Implementation strategy for Noda Time in an existing MVC5 application

Our application is a big n-tier ASP.NET MVC application that is heavily dependent on Dates and (local) Times. Up until now we have been using DateTime for all our models, which worked fine because for years we were strictly a national website,…
Fred Fickleberry III
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Getting Started with Noda Time

I am looking to use Noda time for a fairly simple application, however I am struggling to find any documentation to handle a very basic use case: I have a logged in user, and will be storing their preferred timezone in the settings. Any date/times…
Paul Grimshaw
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NodaTime conversions (Part 2). How to?

Following my first post: DateTime conversions using NodaTime on ASP.Net MVC 3 Razor website. How to? I'm struggling to find an easy way to convert date/time between local and UTC (both ways), using NodaTime. The current picture is: I have the…
melancia
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Correctly handling opening times with NodaTime

I'm currently writing a fairly simple app handling opening/closing times of businesses and running into serious difficulties trying to figure out how to properly store the info. Most of our critical functionality is heavily dependent on getting…
Josh P
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How should I populate a list of IANA / Olson time zones from Noda Time?

I am using NodaTime in an application, and I need the user to select their timezone from a dropdown list. I have the following soft requirements: 1) The list only contain choices that are reasonably valid for the present and near future for real…
Matt Johnson-Pint
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