Date and time

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• @sigx/serializeThe boundary codec for SignalX — how Date, Map, Set, BigInt and custom types survive every server↔client boundary: the SSR state blob, resume boundary props, the cache seed, and the server-function RPC wire
• handlebars.momentHandlebars helpers for moment.js
• tz-idsAn array of time zone IDs
• timeshift-jsTime and timezone mocking / overriding
• relative-dateJavascript module for outputting relative dates.
• node-geometry-libraryJavascript Geometry Library provides utility functions for the computation of geometric data on the surface of the Earth. Code ported from Google Maps Android API.
• moment-parseplusDate parsing plugin for momentjs
• @basemachina/dayjsA fork of iamkun/dayjs.
• unexpected-dateUnexpected plugin for date/time assertions
• @date/holidaysStore and compare holiday dates
• @date/generatorCalculate dates with easy to read helper functions
• @date/holidays-usUSA bank and (some) public holidays
• git-date-extractorEasily extract file dates based on git history, and optionally cache in a easy to parse JSON file.
• moment-utlMoment.js utilities.
• moment-countdownA Moment.js plugin for integrating with Countdown.js
• @odata2ts/converter-commonLuxon based odata2ts compatible converters for date and time related OData types
• luxon-parserAdd DateTime.fromHuman() and DateTime.fromAny() functions to Luxon that can parse a wide range of date formats including human-input dates
• twasGenerate time ago string
• @0dep/pisoISO 8601 interval, date, and duration parser
• node-schedule-tzA cron-like and not-cron-like job scheduler with timezone support for Node.
• nunjucks-datePlugin for nunjucks of momentjs format date
• s-ageCalculate years since a date (eg. a person's age given date of birth)
• timediffCalculate a time difference in several time units.
• @odata2ts/converter-ui5-v2Collection of odata2ts compatible converters suitable for integrating with UI5's OData V2 model
• bruce-millisConvert various time formats to milliseconds
• bruce-millis-optionConvert various time formats to milliseconds and throw if result is NaN
• date-format-liteA small library for parsing and formatting dates
• @cdktn/provider-timePrebuilt time Provider for CDK Terrain (cdktn)
• time-nowReturns a timestamp using Performance.now or Date.now
• business-calendarUp-to-date business calendar
• @markwhen/rruleJavaScript library for working with recurrence rules for calendar dates.
• @bbc/psammead-localesA collection of locale configs, used in BBC World Service sites
• vite-plugin-time-reporterTime reporting for Vite project
• @coast/rruleJavaScript library for working with recurrence rules for calendar dates.
• business-momentBusiness calendar momentjs plugin
• datevalidatorA very simple date validator for handling year, month, and day values. The package works as a node module as well as in a browser.
• axios-date-transformerAn Axios transformer for seamlessly converting ISO 8601 formatted date strings with millisecond precision to JavaScript Date objects. Simplify handling of Date objects in JSON responses with this lightweight utility.
• moment-weekday-calcWeekdays calculator: calculates number of days from the given set within the given diff. For example: calculate quantity of business days in 2015 financial year starting on 1 Apr 2015
• gregorian-calendardate time utils ported from java
• kanjidatea small library that formats dates in Japanese
• daily-versionGet the current date formatted as a version. Automatically add the time if you already released a version today.
• zoned-date-timeA tiny JavaScript Date with full IANA timezone support
• holiday-calendarA standardized date dataset providing public holidays and working day adjustments for different regions
• gregorian-calendar-formatformat utils for gregorian-calendar
• persian-dateJavascript date library for parsing, validating, manipulating, and formatting persian dates System.
• random-date-generatorGenerator of random dates
• tz-local-dateFast timezone-aware date comparsion and manipulation
• @fregante/mi-cronA microscopic parser for standard cron expressions.
• @lichtblick/rostimeROS (Robot Operating System) Time and Duration primitives and helper methods
• kiss-datekeep it simple stupid date library

• date-fns vs dayjs
• date-fns vs luxon
• dayjs vs moment
• date-fns vs moment
• luxon vs dayjs
• moment vs luxon
• date-fns-tz vs @js-joda/core