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title: "Changing the Business Hours for a Day"
canonical: "https://docs.rubiconwater.com/space/ANC/1991540737/Changing%20the%20Business%20Hours%20for%20a%20Day"
format: markdown
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> Macro (toc)

A Business Hours period is defined for each day of the week. You can modify this to change the business hours for any day of the week.

1. In the Alarm Periods module select the day that you want to change and click **Modify** to open the Updating alarm period screen.
2. Make sure that the **All Day Event** checkbox is *not* selected so that you can change the Start and End times of the alarm period.
3. Enter the **Start Time** and the **End Time** of business hours for the day. Any time outside of these hours will be after hours.

> ℹ️ **Note**
> ℹ️ 
> ℹ️ Business hours must be a solid block of time for the day, you cannot split the day into more than one business hours block.

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