metomi-isodatetime
Python ISO 8601 date time parser and data model/manipulation utilities
Decision gist · record as of 2026-08-14
Yes. This package is worth installing if you need to parse or work with ISO 8601 date-time strings in a standards-compliant way. It has zero runtime dependencies, is actively maintained, supports current Python versions, and carries no known security vulnerabilities. The LGPLv3 license is permissive for most use cases. Install it if your application receives or generates ISO 8601 formatted dates.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Installs cleanly with no runtime dependencies.
- Actively maintained with recent commits and stable production status across Python 3.7–3.11.
License · maintenance · safety
LGPLv3 (copyleft) — Licensed under LGPLv3 (copyleft). You may use and modify the package freely, but any derivative work must also be distributed under LGPLv3 or a compatible license.
last release 2023-10-05 (1044 days) · last repo commit 2026-08-04 · 41 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 78,560 downloads/mo, #14,429 on PyPI
Alternatives
Verify before relying
pip install metomi-isodatetime
import metomi.isodatetime.parsers as parse
import metomi.isodatetime.dumpers as dump
date_time = parse.TimePointParser().parse('2000-01-01T00:00Z')
print(date_time.month_of_year) # 1
duration = parse.DurationParser().parse('P1YT3H')
print(date_time + duration) # <metomi.isodatetime.data.TimePoint: 2001-01-01T03:00:00Z>What it is and what it does
metomi-isodatetime is a full-specification ISO 8601 (2004) parser and data model library for Python. It provides parsers for dates, times, durations, and recurrence patterns, plus utilities to dump and format them. The package is designed to work similarly to Python's built-in datetime module but with complete ISO 8601 support, including extended year formats, week-based dates, ordinal dates, decimal fractions, and timezone offsets.
The library has no runtime dependencies and supports Python 3.7 through 3.11. It exposes both a Python API for programmatic use and a command-line interface for quick parsing and manipulation tasks. It is actively maintained, with recent commits and a stable production classification.
Use it for
- Parse ISO 8601 date-time strings from APIs, logs, or data files into Python objects for manipulation.
- Calculate time intervals and apply durations to dates using ISO 8601 duration syntax (e.g., P1Y, PT3H).
- Generate recurring date sequences from ISO 8601 recurrence patterns (e.g., R/1999/P1Y).
- Format date-time objects back to ISO 8601 strings or custom formats using strftime-style templates.
- Work with extended year ranges (before year 0 or after year 9999) using expanded year syntax.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes.
This package is worth installing if you need to parse or work with ISO 8601 date-time strings in a standards-compliant way. It has zero runtime dependencies, is actively maintained, supports current Python versions, and carries no known security vulnerabilities. The LGPLv3 license is permissive for most use cases. Install it if your application receives or generates ISO 8601 formatted dates.
Install
metomi-isodatetime on PyPI
Before you install
Installs cleanly with no runtime dependencies. Actively maintained with recent commits and stable production status across Python 3.7–3.11.
License in practice
Licensed under LGPLv3 (copyleft). You may use and modify the package freely, but any derivative work must also be distributed under LGPLv3 or a compatible license.
Quickstart
pip install metomi-isodatetime
import metomi.isodatetime.parsers as parse
import metomi.isodatetime.dumpers as dump
date_time = parse.TimePointParser().parse('2000-01-01T00:00Z')
print(date_time.month_of_year) # 1
duration = parse.DurationParser().parse('P1YT3H')
print(date_time + duration) # <metomi.isodatetime.data.TimePoint: 2001-01-01T03:00:00Z>Package facts
| License | LGPLv3 copyleft |
| Python support | Supports the current Python release >=3.7 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | None |
| Maintenance | Actively maintained 1,044 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 78,560 / month, #14,429 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/StableEnvironment :: Other EnvironmentIntended Audience :: DevelopersLicense :: OSI Approved :: GNU Lesser General Public License v3 (LGPLv3)Operating System :: OS IndependentProgramming Language :: Python :: 3 :: OnlyProgramming Language :: Python :: 3.10Programming Language :: Python :: 3.11Programming Language :: Python :: 3.7Programming Language :: Python :: 3.8Programming Language :: Python :: 3.9Topic :: Software Development :: Libraries :: Python ModulesTopic :: Utilities |
Evidence: metomi_isodatetime-1!3.1.0-py3-none-any.whl
Tags
Let your AI agent find packages like this
Example. Real query, live index.
You found this page by searching. An agent finds it by wishing: SkillFed indexes 14,416 PyPI packages by what they can do, searchable in plain language.
wish › “parse ISO date time”
- metomi-isodatetimeParses and manipulates ISO 8601 date-time strings according to the…
- isodateParses and formats ISO 8601 date, time, duration, and timezone…
- aniso8601Parses ISO 8601 date, time, datetime, duration, and interval strings…
Give your agent the search over MCP, or paste the wish link into any chat.
More Python Modules packages
Converts domain names between Unicode and ASCII-compatible encoding (Punycode) according to IDNA 2008 and Unicode Technical Standard 46, with security validation and broader script coverage than the standard library.
Install it if you work with internationalized domain names, need to validate domains, or use HTTP clients that depend on it transitively.
Setuptools is a Python build backend and package management tool that handles building, distributing, and installing Python packages, including support for C/C++ extension modules.
PyYAML parses and emits YAML 1.1 data format, enabling serialization and deserialization of configuration files and Python objects to and from human-readable YAML text.
Pydantic validates Python data structures against type hints, coercing and checking input at runtime to ensure it matches a declared schema.
Provides reusable metadata objects for use with PEP-593 `typing.Annotated` to express common constraints like bounds, collection sizes, and predicates on types.
Install it if you use or build libraries that need to express type constraints in a standardized, inspectable way—or if you want to annotate your own types with…
Provides runtime tools to inspect and introspect Python type annotations, enabling programmatic examination of type hints at execution time.
See also iso8601 · isodate · aniso8601 · isoduration · DateTime · isoweek · dateformat · timelib · iso-week-date · pytimeparse2