# hour

Learn how to use the hour function in Notion formulas.

The `hour()` function returns an integer (number) between `0` and `23` that corresponds to the hour of its date argument.

``````hour(date)

date.hour()
```Code language: JavaScript (javascript)```

`hour()` (and its sibling functions minute, day, date, month, and year) is useful for manipulating dates within Notion formulas.

``````hour(now()) /* Output: 11 (When current time was 11:25 AM) */

/* Assume a propety called Date with a current date of June 24, 2022 11:29 AM */
prop("Date").hour() /* Output: 11 */
```Code language: JavaScript (javascript)```

`hour()` can be used with other functions such as dateSubtract to change the value of a date, like so:

``````/* Assume the value of now() is June 24, 2022 11:34 AM */
now().dateSubtract(now().hour(), "hours")
/* Output: June 24, 2022 12:34 AM */
```Code language: JavaScript (javascript)```

You can take this concept even further to “hard-code” any date into a Notion formula. See the section on Hard-Coding Dates into Formulas within the now article for more on how to do this.

This example database groups events in a Renaissance Faire by their time of day – Morning, Afternoon, and Evening. These three options are returned by the Time of Day formula property.

``````ifs(
prop("Date").hour() >= 18,
"🌔 Evening",
prop("Date").hour() >= 12,
"🌤 Afternoon",
"🌄 Morning"
)
```Code language: JavaScript (javascript)```

Here, we use a nested if statement to first check if the `hour()` value of the Date property is greater than or equal to 18 (which is 6:00 PM in 12-hour time).

If yes, the formula returns “🌔 Evening”.

If not, we then check if the `hour()` value is greater than or equal to 12 (noon in 12-hour time).

If yes, the formula returns “🌤 Afternoon”. If no, it returns “🌄 Morning”.

From there, we can set the database view to Group by the output of this formula property: