Dotnet Timezone

Handles timezone lookups and conversions for C# applications with ready-to-use code snippets. Give it a city, address, or region and it returns both Windows and IANA timezone IDs plus working examples. It knows when to use TimeZoneInfo versus TimeZoneConverter versus NodaTime depending on whether you're shipping cross-platform, dealing with DST edge cases, or building recurring schedulers. The guidance is pleasantly opinionated about common mistakes like storing DateTime.Now in databases or ignoring DateTimeKind.Unspecified. Useful if you're tired of guessing which timezone ID format works in which environment or debugging DST transitions that skip or repeat timestamps.

skills.sh installs: 1.6K
GitHub stars: 41K
last updated: Aug 21, 2026

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Install

$ npx -y skills add github/awesome-copilot --skill dotnet-timezone --agent claude-code

Installs into .claude/skills of the current project.

Files

.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:

Extract each location from the input.
Read references/timezone-index.md for common Windows and IANA mappings.
If the exact location is not listed, infer the correct IANA zone from geography, then map it to the Windows ID.
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:

SKILL.md on GitHub

Details

Repository: github.com/github/awesome-copilot
Categories: Git & Pull Requests, AI & Agent Building, Marketing & SEO, .NET & C#
First seen: Apr 16, 2026