<b>I shared the date formatting operations that I think are used most frequently.</b> <br/><br/> const { dateToTimeStamp, add3Hour, formatDate, formatDateAndTime, formatTime, addDays, nowToTimeStamp, timeStampToDate,formatDateAndTimeForFileName } = requ

Time helpers: named duration constants, calendar-date parsing and arithmetic, and a side-effect-free Temporal

Date arithmetic + format mock harness for kiwa — date-fns / dayjs / Luxon / Temporal を統一 interface で invoke する in-process mock。 addDays / diffDays / formatDate / parseDate / timezoneConvert を real provider と同じ signature で叩ける test infra。

Domain-neutral temporal kernel: time model, durations, grid resolution, formatting. Shared across all BIMETAL component families.

| function | params | description | | ---- | ---- | ---- | | toString | args = 'yyyy-MM-dd HH:mm:ss' | format a datetime to string | | addDays | value | add days to time, return a new instance | | addHours | value | add hours to time, return a new ins

A lightweight JavaScript date utility library that provides modularity, high performance, and additional features. It supports various date operations, including date addition and subtraction, formatting, comparison, etc.

Typescript utils library

Dependency-free calendar-day bucketing and streak math primitives, with an optional Node-only on-disk store. Helper for svelte-insight-tracker.

The Stacks datetime helpers.

Date utilities for JavaScript that are simple, predictable and easy to learn.

Dependency-free calendar-day bucketing and streak math primitives, with an optional Node-only on-disk store. Helper for svelte-streak-cal.

### Epoq is two classes to help tame excess precision in the Date object.

Dependency-free calendar-day bucketing and streak math primitives, with an optional Node-only on-disk store. Helper for streak-calc-math.

Утилиты и функции общего назначения.

export-kit is a simple, schema-driven data export library for TypeScript

A gas-efficient Solidity date and time library.

An immutable duration library based on the ISO-8601 format for durations.

Juicyllama Utils

Date library for btrz

A date library dealing only with days in the YYYY-MM-DD format