---
id: aiozoneinfo
version: "0.2.3"
license: Apache-2.0
license_treatment: permissive
maintenance: active
---

# aiozoneinfo — Tools to fetch zoneinfo with asyncio

License: permissive · Maintenance: active · Downloads: 603.9K/mo

## What it is and what it does

aiozoneinfo wraps timezone data fetching for asyncio applications. It provides a single public method, `async_get_time_zone`, that retrieves ZoneInfo objects without blocking the event loop. The package depends on backports.zoneinfo and tzdata, and is designed for scenarios where timezone lookups might otherwise stall async code.

The package targets Python 3.9 through 3.13 and uses an executor to offload disk I/O when constructing new ZoneInfo objects, keeping the event loop responsive. This is most useful in async web services, background task runners, or other I/O-bound applications that need timezone information on demand.

Use it for:

- Async web services that need to convert timestamps to user timezones without blocking request handlers
- Background task schedulers that fetch timezone data for scheduled jobs across multiple regions
- Real-time data processing pipelines that enrich events with timezone-aware timestamps
- Microservices handling timezone-dependent business logic in concurrent request contexts

## Worth the install?

AI-flagged interpretation of the facts above — verify before relying.

Fetches timezone information asynchronously using asyncio, avoiding blocking I/O in the event loop by caching ZoneInfo objects or constructing them in an executor.

Yes, if you are building asyncio applications that need timezone lookups and want to avoid event loop blocking. The low install friction, permissive license, and active maintenance make it a safe choice. However, the Pre-Alpha status and small user base mean you should test it in your specific use case before relying on it in production.

## Install

pip install aiozoneinfo
uv add aiozoneinfo
poetry add aiozoneinfo

## Installing aiozoneinfo

Before you install: Low install friction with a pure Python wheel and minimal dependencies. Actively maintained with a recent commit on 2026-08-10, though marked Pre-Alpha.

License in practice: Licensed under Apache-2.0 (permissive), allowing commercial and private use with minimal restrictions.

Quickstart:

pip install aiozoneinfo

import asyncio
from aiozoneinfo import async_get_time_zone

async def main():
    zone_info = await async_get_time_zone("America/Los_Angeles")

asyncio.run(main())

Requires Python 3.9 or later.

Verify before relying:

- Whether the internal cache persists across application restarts or is memory-only
- Performance characteristics compared to synchronous ZoneInfo access
- Thread-safety guarantees when used in multi-threaded contexts

## Package facts

- License: Apache-2.0 (permissive)
- Python support: supports_current
- Install friction: low
- Maintenance: active
- Downloads: 603.9K/month (top 15,000 on PyPI)
- Known vulnerabilities: none known

## Tags

async timezone lookup, asyncio zoneinfo, non-blocking timezone fetch, async timezone cache, zoneinfo with asyncio, timezone info async, event loop safe timezone, asyncio, timezone-handling

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