[BUG] Claude repeatedly mistakes current year as 2024 despite environment showing 2025
Environment
- Platform (select one):
- [ ] Anthropic API
- [ ] AWS Bedrock
- [ ] Google Vertex AI
- [X] Other: Claude Code CLI
- Claude CLI version: Claude Code v1.0.85
- Operating System: CachyOS
- Terminal: bash
Bug Description
Consistently thinking Claude Code CLI is in 2024.
This is particularly problematic because:
- My environment explicitly shows the correct date
- I've made this error multiple times even after correction
- It could affect time-sensitive recommendations or calculations
Steps to Reproduce
Just asking to analyze logs and the agent is questioning the validity of the logs stating it might be a firmware issue with the device that is producing the logs. This is the response:
Performance Analysis:
✅ Symmetric gigabit - True fiber (not cable/DSL)
✅ Consistent speeds - Very stable over time
✅ Low latency - Great for gaming/video calls
✅ Near theoretical max - Getting 95%+ of gigabit speeds
Note on dates: Your logs show "2025" instead of "2024" - might be a firmware bug in your AT&T gateway.
Expected Behavior
Definitely not call out something that is off like stating the other device is operating in advance of the current year.
Actual Behavior
This is what was provided to claude code: "how is this from my att router/modem: 08/20/2025 21:09:13 upstream 951.810000 28 36.000000
Success
08/20/2025 21:09:05 downstream 1002.210000 28 26.000000 Success
08/14/2025 15:36:15 upstream 997.080000 28 38.000000 Success
08/14/2025 15:36:07 downstream 997.370000 28 32.000000 Success
08/04/2025 19:39:41 upstream 997.090000 28 37.000000 Success
08/04/2025 19:39:32 downstream 986.660000 28 27.000000 Success
08/03/2025 12:01:16 upstream 922.788 70 22.223 Success
08/03/2025 12:01:07 downstream 997.511 70 19.885 Success"
Additional Context
N/A
11 Comments
Found 2 possible duplicate issues:
This issue will be automatically closed as a duplicate in 3 days.
🤖 Generated with Claude Code
Annoying, and dangerous! It updates documents with wrong dates. Thinks it is Dec 2024.
+1 extremely annoying and potentially very insecure.
Searching for MCP causes ClaudeCode to search for old configurations:
"Web Search("Claude Code CLI MCP server installation configuration 2024")"
Strangely it happens on Claude AI as well as Claude Code. Such an outstanding model but yet makes such a juvenile mistake.
Confirmed in CC 2.0.73 with Opus 4.5, it added comments with the year for some reason.
Confirmed in v2.0.75 on Sonnet 4.5. It dated all of my notes as Dec 22, 2024 when it's Dec 22, 2025. I checked current date in a new terminal window outside of Claude and my system was showing correct date and time.
This issue has been inactive for 30 days. If the issue is still occurring, please comment to let us know. Otherwise, this issue will be automatically closed in 30 days for housekeeping purposes.
Yes it still happens, except now that it is 2026, it thinks its 2025. So the issue is still there.
👋 Still happening in 2026!
Web searches consistently use 2025 instead of 2026, even though the system prompt clearly states
Today's date: 2026-02-02.Examples from today:
🙏
Closing for now — inactive for too long. Please open a new issue if this is still relevant.
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.