---
id: types-pyrfc3339
version: "2.0.1.20250825"
license: Apache-2.0
license_treatment: permissive
maintenance: active
---

# types-pyRFC3339 — Typing stubs for pyRFC3339

License: permissive · Maintenance: active · Downloads: 341.1K/mo

## What it is and what it does

This is a type stub package—a collection of type annotations that helps static type checkers understand the pyRFC3339 library without needing to execute its code. It's part of the typeshed project, the standard repository of type stubs for Python packages that predate or lack built-in type support.

The package targets pyRFC3339~=2.0.1 and has been tested with mypy 1.17.1 and pyright 1.1.404. It has no runtime dependencies and installs cleanly. However, it's designed as a temporary bridge: pyRFC3339 added native type annotations starting in version 2.1.0, so this stub becomes unnecessary if you upgrade to that version or later.

Use it for:

- Enable type checking in projects using pyRFC3339 2.0.x with mypy or pyright without waiting for native type support.
- Catch type errors in RFC 3339 date parsing and formatting code before runtime in a typed codebase.
- Maintain strict type checking across a project that depends on an older version of pyRFC3339.

## Worth the install?

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

Provides type hints for pyRFC3339, enabling type checkers like mypy and pyright to validate code using pyRFC3339 for RFC 3339 date and time handling.

Yes, but with a clear condition: install this only if you are using pyRFC3339 version 2.0.x and need type checking support. If you're already on pyRFC3339 2.1.0 or later, uninstall it—the library now includes its own type annotations. For 2.0.x users who rely on static type checking, it's a straightforward, low-friction addition.

## Install

pip install types-pyrfc3339
uv add types-pyrfc3339
poetry add types-pyrfc3339

## Installing types-pyRFC3339

Before you install: Low friction installation with no runtime dependencies. Actively maintained as part of typeshed; last commit 2026-08-14.

License in practice: Licensed under Apache-2.0 (permissive), allowing use in most commercial and open-source projects without significant restriction.

Quickstart:

pip install types-pyrfc3339

import pyrfc3339
# Type checker now understands pyrfc3339 types

Requires Python >=3.9

Verify before relying:

- Whether this stub package remains necessary if you're using pyRFC3339 2.1.0 or later (description suggests uninstalling in that case).

## Package facts

- License: Apache-2.0 (permissive)
- Python support: supports_current
- Install friction: low
- Maintenance: active
- Downloads: 341.1K/month (top 15,000 on PyPI)
- Known vulnerabilities: none known

## Tags

type stubs pyRFC3339, typing stubs RFC 3339, mypy stubs date time, pyright type hints RFC, type checking RFC 3339 dates, type-stubs, typeshed

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