NuGet · #174 most downloaded on NuGet

TimeZoneConverter

7.2.0335M downloads/momattjohnsonpint/TimeZoneConverter ↗New releases in your daily digest, changelog included.

Lightweight library to convert quickly between IANA, Windows, and Rails time zone names.

Last release 11 months ago
20 Oct 2025
Release timing varies
gaps range from 4 weeks to 1.9 years
Some releases are documented
notes for 10 of 29 stable releases
Nothing withdrawn
no release was ever pulled
10 years old
29 releases · first in 2017

Release timeline

29 releases since 2017

2017201920212023

Releases

7.2.020 Oct 2025
Improve API to help resolve canonical time zones by @ocoanet in #178
Noteworthy Changes

Improve API to help resolve canonical time zones by @ocoanet in #178

Minor Improvements

Bump Microsoft.NET.Test.Sdk from 17.12.0 to 18.0.0 by @dependabot[bot] in #181

Bump Verify.Xunit from 31.0.2 to 31.0.3 by @dependabot[bot] in #180

Bump xunit.runner.visualstudio from 3.0.2 to 3.1.5 by @dependabot[bot] in #179

New Contributors

@ocoanet made their first contribution in #178

Full Changelog: 7.1.0...7.2.0
Open source →

One column per quarter.

feat: update data for TZDB 2025b by @mattjohnsonpint in #164

Noteworthy changes

feat: update data for TZDB 2025b by @mattjohnsonpint in #164
feat: improve Rails zones mapping behavior by @mattjohnsonpint in #166
fix: "try" methods should never throw by @mattjohnsonpint in #176
fix: resolve canonical time zone during retrieval by @mattjohnsonpint in #177
chore: drop .NET 6 target by @mattjohnsonpint in #174
- Note that .NET 6 is still supported via the .NET Standard target

Minor improvements

Fix version numbers in readmes by @jnyrup in #157
Enable .NET analyzers and fix issues by @lahma in #158
Add BenchmarkDotNet benchmark project and DataLoader benchmark by @lahma in #159
chore: update workflows by @mattjohnsonpint in #165
Bump BenchmarkDotNet from 0.14.0 to 0.15.4 by @dependabot[bot] in #167
Bump Roslynator.Analyzers from 4.12.10 to 4.14.1 by @dependabot[bot] in #170
Bump NodaTime from 3.2.0 to 3.2.2 by @dependabot[bot] in #169
Bump xunit.runner.visualstudio from 2.8.2 to 3.0.2 by @dependabot[bot] in #173
Bump Verify.Xunit from 28.9.0 to 31.0.2 by @dependabot[bot] in #172
Bump SharpCompress from 0.32.2 to 0.41.0 by @dependabot[bot] in #171
chore: refactoring by @mattjohnsonpint in #175

New Contributors

@lahma made their first contribution in #158

Full Changelog: 7.0.0...7.1.0

Open source →

7.0.016 Jan 2025

Update targeting to drop .NET 5 and add .NET 9

Bringing the library current.

Update targeting to drop .NET 5 and add .NET 9
Updated to latest data (IANA 2024b)
Update CLDR to latest
Update all dependencies

Open source →

6.1.012 Feb 2023

Updated to latest data (IANA 2022g)

Updated to latest data (IANA 2022g)
Update NodaTime dependency for TimeZoneConverter.Posix
Fix Windows mappings for Mexican time zones (See #136)

Open source →

6.0.15 Sept 2022Breaking

Fix breaking change introduced in 6.0.0.

Fix breaking change introduced in 6.0.0. (#129)

Open source →

6.0.03 Sept 2022

Updated to latest data (IANA 2022c)

Updated to latest data (IANA 2022c)
Added a target for .NET 6
Dropped the .NET Framework 4.6.1 target. Minimum .NET Framework supported is now 4.6.2
Performance improvements (#121)
Fixed potential duplicate key in time zones (#114)
Fix America/Fort_Wayne alias mapping (#117)
Add message when throwing TimeZoneNotFoundException (#116)
Add link resolution mode when converting from Windows to IANA (#119)
Expose IANA Time Zone territories to library consumers (#64 & #125)
Lots more tests, including data verification tests
Code cleanup, refactoring, CI build, etc.

Open source →

5.0.013 Jan 2022

KnownIanaTimeZoneNames , KnownWindowsTimeZoneIds , and KnownRailsTimeZoneNames are now exposed as IReadOnlyCollection<string> instead of ICollection<s

Fix bug #108
KnownIanaTimeZoneNames, KnownWindowsTimeZoneIds, and KnownRailsTimeZoneNames are now exposed as IReadOnlyCollection<string> instead of ICollection<string>.

Open source →

4.0.011 Jan 2022

Updated to latest data (IANA 2021e)

Updated to latest data (IANA 2021e)
Dropped support for older targets. Now targeting .NET Standard 2.0 and .NET Framework 4.6.1 only.

Open source →

3.5.08 Apr 2021

Added override for "South Sudan Standard Time" to "Africa/Juba" - #96

Added override for "South Sudan Standard Time" to "Africa/Juba" - #96
Rebuilt data file using latest sources

Open source →

3.4.013 Feb 2021

Updated to latest data (IANA 2021a)

Updated to latest data (IANA 2021a)
Removed obsolete zones from KnownIanaTimeZoneNames and KnownWindowsTimeZoneIds (#90)
Fixed issue with some Canadian zones mapped incorrectly (#91)

Open source →

3.3.010 Sept 2020