# installed_days_old

> **Function** in `deepagents_code`

📖 [View in docs](https://reference.langchain.com/python/deepagents-code/update_check/installed_days_old)

Return whole days since the installed version's release, or `None`.

Cache-only (`get_release_time`), so it never blocks on the network.
Returns `None` when the release time is unknown (cold cache or an
unparseable timestamp). Best-effort: any unexpected error degrades to
`None` rather than propagating, since this runs on the startup path.

## Signature

```python
installed_days_old() -> int | None
```

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[View source on GitHub](https://github.com/langchain-ai/deepagents/blob/7794b61a6e76230e8c7a49bdce808b3728305914/libs/code/deepagents_code/update_check.py#L901)