pyRFC3339
Generate and parse RFC 3339 timestamps
Decision gist · record as of 2026-08-14
Yes. pyRFC3339 is a stable, actively maintained library with zero dependencies, permissive licensing, and no known vulnerabilities. Install it if you need to work with RFC 3339 timestamps; the low friction and narrow, well-defined scope make it a reliable choice for timestamp serialization and parsing.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires Python 3.9 or later.
- Low install friction with no runtime dependencies.
- Actively maintained as of 2026-08-09 with recent release history.
License · maintenance · safety
MIT (permissive) — MIT license permits unrestricted use, modification, and distribution with minimal restrictions.
last release 2025-08-23 (356 days) · last repo commit 2026-08-09 · 15 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 15,529,723 downloads/mo, #1,182 on PyPI
Alternatives
Verify before relying
pip install pyRFC3339
from pyrfc3339 import generate, parse
from datetime import datetime, timezone
generate(datetime.now(timezone.utc))
parse('2009-01-01T10:01:02Z')What it is and what it does
pyRFC3339 is a lightweight library for working with RFC 3339-compliant timestamps in Python. It provides two core functions: `generate()` converts a timezone-aware datetime object into an RFC 3339 string, and `parse()` converts an RFC 3339 string back into a datetime object with proper timezone information. The library handles the details of timestamp formatting and parsing so you don't have to manually construct or interpret RFC 3339 strings.
This is useful for any application that needs to exchange timestamps with APIs, databases, or other systems that expect RFC 3339 format—a standard used widely in web services and data interchange. The library has no external dependencies and supports current Python versions from 3.9 onward, making it straightforward to add to any project.
Use it for
- Serialize datetime objects to RFC 3339 strings for REST API responses or JSON payloads.
- Parse RFC 3339 timestamps from external APIs or configuration files into Python datetime objects.
- Ensure consistent timestamp formatting across services that require RFC 3339 compliance.
- Handle timezone-aware datetime conversions without manual string manipulation.
- Generate audit logs or event timestamps in a standardized, interoperable format.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes.
pyRFC3339 is a stable, actively maintained library with zero dependencies, permissive licensing, and no known vulnerabilities. Install it if you need to work with RFC 3339 timestamps; the low friction and narrow, well-defined scope make it a reliable choice for timestamp serialization and parsing.
Install
pyrfc3339 on PyPI
Before you install
Low install friction with no runtime dependencies. Actively maintained as of 2026-08-09 with recent release history.
Requires Python 3.9 or later.
License in practice
MIT license permits unrestricted use, modification, and distribution with minimal restrictions.
Quickstart
pip install pyRFC3339
from pyrfc3339 import generate, parse
from datetime import datetime, timezone
generate(datetime.now(timezone.utc))
parse('2009-01-01T10:01:02Z')Package facts
| License | MIT permissive |
| Python support | Supports the current Python release >=3.9 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | None |
| Maintenance | Actively maintained 356 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 15,529,723 / month, #1,182 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 :: 3Programming Language :: Python :: 3 :: OnlyProgramming Language :: Python :: 3.10Programming Language :: Python :: 3.11Programming Language :: Python :: 3.12Programming Language :: Python :: 3.13Programming Language :: Python :: 3.9Topic :: Internet |
Evidence: pyrfc3339-2.1.0-py3-none-any.whl
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See also rfc3339 · tonyg-rfc3339 · types-pyRFC3339 · snaptime · ciso8601 · rfc3161ng · aniso8601 · strict-rfc3339 · PyCampbellCR1000 · rfc3161-client