denoland-deno/tests/specs/run/unstable_temporal_api_patch/main.ts

console.log(Temporal.Now.timeZoneId());
// @ts-expect-error: undefined check
console.log(Temporal.Now.timeZone);

const zoned = new Temporal.ZonedDateTime(0n, "UTC");
console.log(zoned.calendarId);
console.log(zoned.timeZoneId);
// @ts-expect-error: undefined check
console.log(zoned.calendar);
// @ts-expect-error: undefined check
console.log(zoned.timeZone);

const duration = Temporal.Duration.from("P1DT6H30M");
console.log(duration.toLocaleString("en-US"));