[FEATURE] Claude Code CLI can detect timezone

[shalako]

Preflight Checklist

• I have searched existing requests and this feature hasn't been requested yet
• This is a single feature request (not multiple features)

Problem Statement

Problem Statement

Claude cannot accurately display calendar event times or determine "current time"
relative to the user because system timezone is not included in the environment
context.

Impact

• Affected Use Cases: Calendar/scheduling MCP tools, time-based queries, travel
  scenarios
• User Experience: Incorrect meeting times displayed, especially during DST
  transitions

Proposed Solution

Current Behavior

Environment block includes: working directory, git status, platform, shell, OS
version
Environment block does not include: timezone

Desired Behavior

Add timezone to block:
Timezone: America/Los_Angeles (PDT, UTC-7)

User Benefits

1. Accurate meeting time display across DST transitions
2. Correct filtering of "upcoming" or "remaining" events
3. Automatic timezone detection when users travel
4. No manual CLAUDE.md configuration needed

Implementation Notes

Detection methods:

• macOS/Linux: date +%Z or read /etc/localtime
• Windows: System timezone settings

Format suggestion: {IANA_timezone} ({abbreviation}, UTC{offset})
Example: America/Los_Angeles (PDT, UTC-7)

Alternative Solutions

Workaround

Users can manually document timezone in CLAUDE.md, but this doesn't handle DST or
travel automatically.

Priority

Medium - Would be very helpful

Feature Category

Configuration and settings

Use Case Example

Using MCP to use calendar as source for problem solving. Claude gets the times of events wrong because it doesn't know my timezone. I could save it manually, but as soon as I go on a business trip, Claude gets event times wrong.

Additional Context

No response

[github-actions]

Found 3 possible duplicate issues:

1. Rate limit reset time displays wrong timezone offset after travel #26853
2. Feature request: configurable timezone for usage limit reset time display #32550
3. Insights report hardcodes PT timezone instead of using system timezone #23269

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[github-actions]

Closing for now — inactive for too long. Please open a new issue if this is still relevant.

[github-actions]

This issue has been automatically locked since it was closed and has not had any activity for 7 days. If you're experiencing a similar issue, please file a new issue and reference this one if it's relevant.