Schema: support subset of the Temporal API

This article https://brandondong.github.io/blog/javascript_dates/ (the history part is shocking e.g. how Chrome changed timezone parsing) triggered me to finally read up on the new native Temporal API that’s coming in JS. The best part: with a Polyfill it’s already working

Temporal supports a couple of Date/Time formats we want to have and my suggestion is to only use the Temporal API for Hypergraph. We could start with:

• Temporal.PlainDate (only date without time and timezone)
• Temporal.PlainTime (only time, no date or timezone)
• Temporal.ZonedDateTime (date + time + timezone which can be UTC)

Schema example:

export class Person extends Entity.Class<Person>('Person')({
  birthday: Entity.PlainDate,
  alarm: Entity.PlainTime,
  upgradeToProAccount: Entity.ZonedDateTime,
}) {}

Great article with examples:L https://waspdev.com/articles/2025-05-24/temporal-api
Polyfill: https://www.npmjs.com/package/temporal-polyfill

Also remove Date then.

Inizia con l’esempio di schema TypeScript e leggi gli articoli collegati sulla Temporal API e la documentazione del polyfill. Determina come dovrebbero essere rappresentati Temporal.PlainDate, Temporal.PlainTime e Temporal.ZonedDateTime negli schemi Hypergraph e verifica che il tipo Date esistente venga rimosso. L’issue non indica file o test, quindi individuare le definizioni correnti dei tipi dello schema fa parte dell’indagine.