# Constants
> Time constants.
## Usage
```javascript
var constants = require( '@stdlib/constants/time' );
```
#### constants
Time constants.
```javascript
var c = constants;
// returns {...}
```
- [`HOURS_IN_DAY`][@stdlib/constants/time/hours-in-day]: number of hours in a day.
- [`HOURS_IN_WEEK`][@stdlib/constants/time/hours-in-week]: number of hours in a week.
- [`MILLISECONDS_IN_DAY`][@stdlib/constants/time/milliseconds-in-day]: number of milliseconds in a day.
- [`MILLISECONDS_IN_HOUR`][@stdlib/constants/time/milliseconds-in-hour]: number of milliseconds in an hour.
- [`MILLISECONDS_IN_MINUTE`][@stdlib/constants/time/milliseconds-in-minute]: number of milliseconds in a minute.
- [`MILLISECONDS_IN_SECOND`][@stdlib/constants/time/milliseconds-in-second]: number of milliseconds in a second.
- [`MILLISECONDS_IN_WEEK`][@stdlib/constants/time/milliseconds-in-week]: number of milliseconds in a week.
- [`MINUTES_IN_DAY`][@stdlib/constants/time/minutes-in-day]: number of minutes in a day.
- [`MINUTES_IN_HOUR`][@stdlib/constants/time/minutes-in-hour]: number of minutes in an hour.
- [`MINUTES_IN_WEEK`][@stdlib/constants/time/minutes-in-week]: number of minutes in a week.
- [`MONTHS_IN_YEAR`][@stdlib/constants/time/months-in-year]: number of months in a year.
- [`SECONDS_IN_DAY`][@stdlib/constants/time/seconds-in-day]: number of seconds in a day.
- [`SECONDS_IN_HOUR`][@stdlib/constants/time/seconds-in-hour]: number of seconds in an hour.
- [`SECONDS_IN_MINUTE`][@stdlib/constants/time/seconds-in-minute]: number of seconds in a minute.
- [`SECONDS_IN_WEEK`][@stdlib/constants/time/seconds-in-week]: number of seconds in a week.
## Examples
```javascript
var objectKeys = require( '@stdlib/utils/keys' );
var constants = require( '@stdlib/constants/time' );
console.log( objectKeys( constants ) );
```
[@stdlib/constants/time/hours-in-day]: https://www.npmjs.com/package/@stdlib/constants/tree/main/time/hours-in-day
[@stdlib/constants/time/hours-in-week]: https://www.npmjs.com/package/@stdlib/constants/tree/main/time/hours-in-week
[@stdlib/constants/time/milliseconds-in-day]: https://www.npmjs.com/package/@stdlib/constants/tree/main/time/milliseconds-in-day
[@stdlib/constants/time/milliseconds-in-hour]: https://www.npmjs.com/package/@stdlib/constants/tree/main/time/milliseconds-in-hour
[@stdlib/constants/time/milliseconds-in-minute]: https://www.npmjs.com/package/@stdlib/constants/tree/main/time/milliseconds-in-minute
[@stdlib/constants/time/milliseconds-in-second]: https://www.npmjs.com/package/@stdlib/constants/tree/main/time/milliseconds-in-second
[@stdlib/constants/time/milliseconds-in-week]: https://www.npmjs.com/package/@stdlib/constants/tree/main/time/milliseconds-in-week
[@stdlib/constants/time/minutes-in-day]: https://www.npmjs.com/package/@stdlib/constants/tree/main/time/minutes-in-day
[@stdlib/constants/time/minutes-in-hour]: https://www.npmjs.com/package/@stdlib/constants/tree/main/time/minutes-in-hour
[@stdlib/constants/time/minutes-in-week]: https://www.npmjs.com/package/@stdlib/constants/tree/main/time/minutes-in-week
[@stdlib/constants/time/months-in-year]: https://www.npmjs.com/package/@stdlib/constants/tree/main/time/months-in-year
[@stdlib/constants/time/seconds-in-day]: https://www.npmjs.com/package/@stdlib/constants/tree/main/time/seconds-in-day
[@stdlib/constants/time/seconds-in-hour]: https://www.npmjs.com/package/@stdlib/constants/tree/main/time/seconds-in-hour
[@stdlib/constants/time/seconds-in-minute]: https://www.npmjs.com/package/@stdlib/constants/tree/main/time/seconds-in-minute
[@stdlib/constants/time/seconds-in-week]: https://www.npmjs.com/package/@stdlib/constants/tree/main/time/seconds-in-week