rfc3339
Format dates according to the RFC 3339.
Decision gist · record as of 2026-08-14
Yes, if you need RFC 3339 formatting and can accept an unmaintained package. The library is simple, dependency-free, and has no known vulnerabilities. However, verify that its implementation meets your requirements and consider the risk of abandonment if you need long-term support or encounter bugs.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Installation is straightforward with no runtime dependencies.
- However, the package has been abandoned since 2019-09-24 and receives no maintenance, which may pose a risk if bugs are discovered.
License · maintenance · safety
ISCL (unclear) — License is marked ISCL with unclear treatment, which may require verification before use in proprietary or copyleft projects.
last release 2019-09-24 (2516 days)
0 known vulnerabilities (OSV.dev, 2026-08-14) · 1,262,035 downloads/mo, #4,147 on PyPI
Alternatives
Verify before relying
pip install rfc3339
import rfc3339
from datetime import datetime
dt = datetime.now()
rfc_string = rfc3339.format(dt)- What obligations ISCL license carries and whether it is equivalent to ISC
- Whether RFC 3339 implementation is complete and spec-compliant
- Python 3 compatibility given classifiers list Python 2.6 and 2.7 but package is abandoned
What it is and what it does
rfc3339 is a lightweight library for formatting and parsing dates according to RFC 3339, the standardized Internet date/time format. It handles conversion between Python datetime objects and RFC 3339-compliant string representations, useful for APIs, HTTP headers, and systems requiring standards-compliant timestamp serialization.
The package has no external runtime dependencies, making it simple to integrate. However, it has been abandoned since its last release on 2019-09-24 and receives no active maintenance. While marked as Production/Stable in its classifiers, the lack of ongoing development means bugs or compatibility issues will not be addressed by the maintainer.
Use it for
- Serialize Python datetime objects to RFC 3339 strings for REST API responses
- Parse RFC 3339 timestamps from HTTP headers or JSON payloads into Python datetime objects
- Generate standards-compliant timestamps for logging or audit trails in networked systems
- Convert between internal datetime representations and RFC 3339 format for data interchange
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes, if you need RFC 3339 formatting and can accept an unmaintained package.
The library is simple, dependency-free, and has no known vulnerabilities. However, verify that its implementation meets your requirements and consider the risk of abandonment if you need long-term support or encounter bugs.
Install
rfc3339 on PyPI
Before you install
Installation is straightforward with no runtime dependencies. However, the package has been abandoned since 2019-09-24 and receives no maintenance, which may pose a risk if bugs are discovered.
License in practice
License is marked ISCL with unclear treatment, which may require verification before use in proprietary or copyleft projects.
Quickstart
pip install rfc3339
import rfc3339
from datetime import datetime
dt = datetime.now()
rfc_string = rfc3339.format(dt)Verify before relying
- What obligations ISCL license carries and whether it is equivalent to ISC
- Whether RFC 3339 implementation is complete and spec-compliant
- Python 3 compatibility given classifiers list Python 2.6 and 2.7 but package is abandoned
Package facts
| License | ISCL unclear |
| Python support | Not specified |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | None |
| Maintenance | Abandoned 2,516 days since the last release |
| First released | |
| Downloads | 1,262,035 / month, #4,147 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Development Status :: 5 - Production/StableIntended Audience :: DevelopersProgramming Language :: PythonProgramming Language :: Python :: 2.6Programming Language :: Python :: 2.7Programming Language :: Python :: 3Topic :: Internet |
Evidence: rfc3339-6.2-py3-none-any.whl
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See also pyRFC3339 · tonyg-rfc3339 · reuters-style · rfc3339-validator · types-pyRFC3339 · strict-rfc3339 · ciso8601 · rfc3161-client · python-mimeparse · http-sfv