Date & Time Packages
Date, time, and timezone parsing, formatting, and manipulation libraries for reliable scheduling and display logic (date-fns, Day.js, Chrono).
Packages in Date & Time
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freezegun
Let your Python tests travel through time by mocking datetime, time, and uuid calls to a fixed or ticking moment.
Babel
The Python internationalization library for locale-aware dates, numbers, and message catalogs
humantime
A fast parser and formatter for std::time::Duration and SystemTime in human-friendly notation
react-timeago
A tiny React component that renders live, self-updating relative timestamps like "5 minutes ago".
cron-validator
A zero-dependency TypeScript library that validates cron expression strings, with support for seconds, aliases, blank days, and nth-weekday syntax.
dateparser
Python library that parses human-readable and relative dates from text across more than 200 language locales.
temporal-polyfill
A lightweight, spec-compliant polyfill for the JavaScript Temporal API, the modern successor to Date.
countries-and-timezones
Minimalistic library for looking up countries, IANA timezones, and their UTC/DST offsets, kept in sync with the tz database.
pendulum
A drop-in replacement for Python's datetime with timezone-aware objects by default and a friendlier API.
timeago.js
Nano library for formatting dates as relative '3 hours ago' statements
Cron Expression
PHP library for parsing CRON expressions and calculating run dates
node-dateformat
A lightweight Node.js port of Steven Levithan's dateFormat() for mask-based date and time formatting.
react-daterange-picker
A fully customizable, accessible date range picker component for React apps, with no moment.js dependency.
cron
A cron expression parser and schedule explorer for Rust
parse-duration
Parses human-readable duration strings like '1h 20m' into milliseconds, with pluggable locales.
tzlocal
Detects the operating system's local timezone as a Python tzinfo object
types-pytz
PEP 561 type stubs that add static typing to the Python pytz timezone library
vue-flatpickr-component
Reactive Vue 3 wrapper component for the Flatpickr date-time picker library.
clock
A small Go interface that swaps the real-time clock for a fully controllable mock, making timer- and deadline-dependent code deterministic to test.
Chrono-TZ
TimeZone implementations for the chrono crate, generated from the IANA time zone database.
Carbon
A simple, fluent PHP API extension for DateTime with translations for 280+ languages.
cron-descriptor
A Python library that converts cron expressions into plain-English, localized descriptions.
chartjs-adapter-dayjs-4
A lightweight Day.js date adapter for Chart.js v4 time scales, enabling accurate date parsing and formatting.
react-calendar
Ultimate calendar for your React app — day, month, year, and decade views with built-in range selection.
