Get the exact system date and time as a `Temporal.Instant`. This method gets the current exact system time, without regard to calendar or time zone. This is a good way to get a timestamp for an event, for example. It works like the old-style JavaScript `Date.now()`, but with nanosecond precision instead of milliseconds. Note that a `Temporal.Instant` doesn't know about time zones. For the exact time in a specific time zone, use `Temporal.Now.zonedDateTimeISO` or `Temporal.Now.zonedDateTime`.

Get the current calendar date and clock time in a specific time zone, using the ISO 8601 calendar.

Get the current date and clock time in a specific time zone, using the ISO 8601 calendar. Note that the `Temporal.PlainDateTime` type does not persist the time zone, but retaining the time zone is required for most time-zone-related use cases. Therefore, it's usually recommended to use `Temporal.Now.zonedDateTimeISO` instead of this function.

Get the current date in a specific time zone, using the ISO 8601 calendar.

Get the current clock time in a specific time zone, using the ISO 8601 calendar.

Get the identifier of the environment's current time zone. This method gets the identifier of the current system time zone. This will usually be a named [IANA time zone](https://en.wikipedia.org/wiki/List_of_tz_database_time_zones).