MCPInstall

dotnet-timezone

by github OfficialBackend & APIs

.NET timezone handling guidance for C applications. Use when working with TimeZoneInfo, DateTimeOffset, NodaTime, UTC conversion, daylight saving time, scheduling across timezones, cross-platform Windows/IANA timezone IDs, or when a .NET user needs the timezone for a city, address, region, or country and copy-paste-ready C code.

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Install

Works with every agent the skills CLI supports.

npx skills add https://github.com/github/awesome-copilot --skill dotnet-timezone
  1. 01

    Install

    Run the command in your project. The CLI asks which agents to install for.

  2. 02

    Describe the task

    Ask your agent for something this skill covers. It loads dotnet-timezone automatically when relevant.

  3. 03

    Review the result

    The agent follows the SKILL.md steps, scripts and references bundled with the skill.

SKILL.md

The instructions your agent reads when the skill is triggered.

.NET Timezone

Resolve timezone questions for .NET and C# code with production-safe guidance and copy-paste-ready snippets.

Start With The Right Path

Identify the request type first:

  • Address or location lookup
  • Timezone ID lookup
  • UTC/local conversion
  • Cross-platform timezone compatibility
  • Scheduling or DST handling
  • API or persistence design

If the library is unclear, default to TimeZoneConverter for cross-platform work. If the scenario involves recurring schedules or strict DST rules, prefer NodaTime.

Resolve Addresses And Locations

If the user provides an address, city, region, country, or document containing place names:

  1. Extract each location from the input.
  2. Read references/timezone-index.md for common Windows and IANA mappings.
  3. If the exact location is not listed, infer the correct IANA zone from geography, then map it to the Windows ID.
  4. Return both IDs and a ready-to-use C# example.

For each resolved location, provide:

Location: <resolved place>
Windows ID: <windows id>
IANA ID: <iana id>
UTC offset: <standard offset and DST offset when relevant>
DST: <yes/no>

Then include a cross-platform snippet like:

using TimeZoneConverter;

TimeZoneInfo tz = TZConvert.GetTimeZoneInfo("Asia/Colombo");
DateTime local = TimeZoneInfo.ConvertTimeFromUtc(DateTime.UtcNow, tz);

If multiple locations are present, include one block per location and then a combined multi-timezone snippet.

If a location is ambiguous, list the possible timezone matches and ask the user to choose the correct one.

Look Up Timezone IDs

Use references/timezone-index.md for Windows to IANA mappings.

Always provide both formats:

  • Windows ID for TimeZoneInfo.FindSystemTimeZoneById() on Windows
  • IANA ID for Linux, containers, NodaTime, and TimeZoneConverter

Generate Code

Use references/code-patterns.md and pick the smallest pattern that fits:

  • Pattern 1: TimeZoneInfo for Windows-only code
  • Pattern 2: TimeZoneConverter for cross-platform conversion
  • Pattern 3: NodaTime for strict timezone arithmetic and DST-sensitive scheduling
  • Pattern 4: DateTimeOffset for APIs and data transfer
  • Pattern 5: ASP.NET Core persistence and presentation
  • Pattern 6: recurring jobs and schedulers
  • Pattern 7: ambiguous and invalid DST timestamps

Always include package guidance when recommending third-party libraries.

Warn About Common Pitfalls

Mention the relevant warning when applicable:

  • TimeZoneInfo.FindSystemTimeZoneById() is platform-specific for timezone IDs.
  • Avoid storing DateTime.Now in databases; store UTC instead.
  • Treat DateTimeKind.Unspecified as a bug risk unless it is deliberate input.
  • DST transitions can skip or repeat local times.
  • Azure Windows and Azure Linux environments may expect different timezone ID formats.

Response Shape

For address and location requests:

  1. Return the resolved timezone block for each location.
  2. State the recommended implementation in one sentence.
  3. Include a copy-paste-ready C# snippet.

For code and architecture requests:

  1. State the recommended approach in one sentence.
  2. Provide the timezone IDs if relevant.
  3. Include the minimal working code snippet.
  4. Mention the package requirement if needed.
  5. Add one pitfall warning if it matters.

Keep responses concise and code-first.

References

  • references/timezone-index.md: common Windows and IANA timezone mappings
  • references/code-patterns.md: ready-to-use .NET timezone patterns

FAQ

What does the dotnet-timezone skill do?

.NET timezone handling guidance for C applications. Use when working with TimeZoneInfo, DateTimeOffset, NodaTime, UTC conversion, daylight saving time, scheduling across timezones, cross-platform Windows/IANA timezone IDs, or when a .NET user needs the timezone for a city, address, region, or country and copy-paste-ready C code.

How do I install dotnet-timezone?

Run npx skills add https://github.com/github/awesome-copilot --skill dotnet-timezone in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/dotnet-timezone/ (personal) or .claude/skills/dotnet-timezone/ (project).

Which AI agents can use dotnet-timezone?

Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.

Is dotnet-timezone safe to install?

No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.

Who maintains dotnet-timezone?

It is published by github in github/awesome-copilot, and it is an official skill from the maker of the technology it covers. It has 1,606 recorded installs.

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