{"categories":[{"label":"Software Development","url":"https://skillfed.io/packages/category/software-development/2"}],"enrichment":{"capability":"Whenever provides type-safe, DST-aware datetime handling for Python with explicit types that distinguish naive from aware datetimes, available as a Rust-backed or pure-Python implementation.","skillfed_tags":["datetime-handling","type-safety","timezone-aware"],"use_cases":["Schedule events across DST transitions without silent hour-skipping bugs.","Enforce type safety in APIs where functions must work only with aware or only with naive datetimes.","Parse and format datetimes in standard formats (ISO8601, RFC2822) with full timezone awareness.","Perform timezone conversions and comparisons with correct DST handling.","Build datetime-heavy applications (e.g., scheduling, logging) where correctness is critical.","Migrate from Arrow or Pendulum when DST correctness and type safety become requirements."],"what_it_does":"Whenever is a modern datetime library that addresses two core limitations of Python's standard library: it handles Daylight Saving Time correctly during arithmetic operations (e.g., adding hours across a DST boundary), and it uses distinct types to enforce type-safe distinction between naive and aware datetimes at compile time. The library provides three main types\u2014Instant (UTC moments), ZonedDateTime (timezone-aware local times), and PlainDateTime (naive local times)\u2014each with explicit semantics that prevent accidental mixing.\n\nThe package is available in two implementations: a Rust-backed version for performance and a pure-Python fallback for compatibility. It supports nanosecond precision, date arithmetic, common datetime formats (ISO8601, RFC3339, RFC2822), and integration with SQLAlchemy and Pydantic. The API is fully typed and follows semantic versioning; until version 1.0, minor releases may introduce breaking changes, though the type system helps identify necessary adjustments.","worth_installing":"Yes. Whenever solves real, well-documented pitfalls in Python's datetime module\u2014particularly DST arithmetic and type safety\u2014that affect any application working with timezones. It has low install friction, active maintenance, no known vulnerabilities, and permissive licensing. The API is pre-1.0 and may change, but type checking will catch those changes. Install it if you work with timezones or need to prevent datetime mixing bugs; skip it only if you never cross timezone boundaries or can tolerate standard library footguns."},"id":"whenever","links":{"html":"https://skillfed.io/packages/whenever","md":"https://skillfed.io/packages/whenever.md","pypi":"https://pypi.org/project/whenever/"},"maintenance":{"status":"active"},"meta":{"latest_release":"2026-08-07","license_spdx":"MIT","license_treatment":"permissive","name":"whenever","python_support":"supports_current","summary":"Modern datetime library for Python"},"popularity":{"monthly_downloads":6877731,"position":1826,"tier":"top_5000"},"security":{"n_vulnerabilities":0},"version":"0.10.5"}