iso-8601-regex

A strict ISO 8601 (RFC 3339) datetime validation regex with full calendar correctness (leap years, day/month limits, and timezone validation). Includes a comprehensive node:test suite.

v0.2.4 URL: https://unpkg.com/iso-8601-regex@0.2.4/strict-iso-8601-regex.js

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iso8601 iso-8601 rfc3339 regex regexp datetime date time validation validator node:test leap-year calendar timezone strict typescript

jsgantt-improved-extended

jsgantt-improved with leap year support and holiday management system

v2.11.8 URL: https://unpkg.com/jsgantt-improved-extended@2.11.8/dist/index.js

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gantt chart project-management calendar timeline scheduling holidays working-days leap-year

dafo

General Date Format

v1.0.1 URL: https://unpkg.com/dafo@1.0.1/index.js

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date-format mysql-date-format php-date-format day-number week-number leap-year

@stdlib/assert-is-leap-year

Test if a value corresponds to a leap year in the Gregorian calendar.

v0.2.2 URL: https://unpkg.com/@stdlib/assert-is-leap-year@0.2.2/lib/index.js

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stdlib stdassert assertion assert utilities utility utils util date year yr leap leap-year gregorian calendar time is isleap isleapyear type check valid validate test isvalid

@upendra.manike/smart-date

Human-friendly date library for JavaScript/TypeScript - converts timestamps into natural language, format dates, calculate differences, add/subtract days, timezone conversion, leap year checks, age calculation, countdown, and more. Comprehensive date util

v1.0.9 URL: https://unpkg.com/@upendra.manike/smart-date@1.0.9/dist/index.js

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