# Time

Explore what information is available for time.

This type represents a time of day as defined by the [ISO 8601](https://en.wikipedia.org/wiki/ISO_8601#times) standard.

> **Defining time values**
>
> Although times have no literal syntax, you can use the [cast modifier](/reference/cql/expressions/modifiers/other/cast) to convert a string into a date-time value.

Local times correspond to the time displayed on a 24-hour clock. They do not represent a specific point on the timeline but rather a time of day. For example, the time 12:00:00 represents noon, regardless of the date or time zone.

## Range

The range of valid times is from 00:00:00 to 23:59:59.999999999.

## Properties

These are the available properties:

- `hour`: `integer`

  The hour of the day, from 0 to 23.

- `minute`: `integer`

  The minute of the hour, from 0 to 59.

- `second`: `integer`

  The second of the minute, from 0 to 59.

- `milli`: `integer`

  The millisecond of the second, from 0 to 999.

- `micro`: `integer`

  The microsecond of the second, from 0 to 999999.

- `nano`: `integer`

  The nanosecond of the second, from 0 to 999999999.