🧭 JavaScript Date Fundamentals
Core concepts: UTC vs local time, ISO parsing, leap years, timezone math, and DST-safe foundations.
Production-focused date and timezone engineering
Build reliable JavaScript date/time features across locales and DST boundaries.
Practical guidance for full-stack teams working with `Date`, `Intl`, and `Temporal` in real-world apps. Learn strict parsing, UTC normalization, and explicit IANA timezone patterns that hold up in production.
🌍 Intl API & Legacy Date Patterns
Locale-aware formatting, cross-browser quirks, safe timezone detection, and migration patterns.
⚙️ Modern Temporal API
Immutable temporal logic, ZonedDateTime workflows, calendar systems, and production Temporal adoption.
Start Here
If you are migrating legacy code, begin with the fundamentals hub first, then move to Intl formatting and finally Temporal architecture.