This is a heavily interactive web application, and JavaScript is required. Simple HTML interfaces are possible, but that is not what this is.
Post
MDN Web Docs
developer.mozilla.org
did:plc:a4klb3lge3phlc4az4uspfpo
JavaScript's date object has been tricky for years, but that is changing.
The NEW Temporal API brings,
š Easily handle time zones
š Precise date math
š Parse ISO strings without errors
ā Durations, date ranges, and more.
Start experimenting š
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal
2025-06-30T10:00:06.137Z