[BUG] Web search tool returns results with incorrect/stale age metadata on Windows 11

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

When using the web search tool from within Claude Code on Windows, search results return with incorrect age metadata. Results that are 1–5 months old are labeled as "last year" or display dates from the prior year, making it impossible to reliably assess the recency of search results.
This makes the web search tool effectively unusable for any time-sensitive research, since the agent cannot distinguish between genuinely stale results and recent ones that are mislabeled.
Steps to Reproduce

Open Claude Code desktop on Windows 11
Run a search query with implicit or explicit recency requirements (e.g. market research, pricing, current events)
Observe that results dated within the last 1–6 months are labeled as "last year" in the search result list

Expected Behavior
Search result age metadata should accurately reflect the publication or last-updated date of the result. A result from March 2026 should display as "4 months ago" or "March 2026", not "last year".
Actual Behavior
Results from 2026 are labeled as "last year", causing the agent (and user) to dismiss recent, valid sources as outdated.
Impact
High. Any workflow that depends on current information (pricing benchmarks, regulatory updates, market research, current docs) is broken. The agent cannot self-correct because the metadata itself is what's corrupted.
Environment

Platform: Windows 11
Claude Code version: latest
Interface: Desktop

What Should Happen?

Search result age metadata should accurately reflect the publication or last-updated date of the result. A result from March 2026 should display as "4 months ago" or "March 2026", not "last year".

Error Messages/Logs

no error,rather false information in the lsit of results, notes from this year , displayed as from last year.

Steps to Reproduce

Open Claude Desktop on Windows 11
Start a new conversation
Ask Claude to search for information about "string" (any query expected to return results from 2026)
Observe the search results returned by the web search tool
Note that multiple results published in 2026 are labeled as "last year" in the results list

Claude Model

Sonnet (default)

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

Claude 1.19367.0 (1a5be1) 2026-07-07T05:45:41.000Z

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Non-interactive/CI environment

Additional Information

_No response_