# Set your business hours
Keeping uses your organization's business hours to calculate your agents' response time. Your business hours will also reflect what times are shown on the [Busiest Times chart](/help/reporting-and-analytics/advanced-reports/team-performance.md) in Advanced Reporting.
Business hours may also be used to determine which auto reply is sent. See [Configure Auto Replies by Business Hours](https://docs.keeping.com/help/fundamentals/enable-an-autoreply#configure-auto-replies-by-business-hours) for more information.
See below on how to configure a per mailbox time zone.
{% hint style="info" %}
If you would like configure business hours where you are "always open", then choose 00:00 to 23:59, and select the **Open** checkbox for every day.
{% endhint %}
Set your business hours and timezone in the **Organization** tab of your **Keeping Settings**.
Access Keeping Settings
### Set a time zone per mailbox
If your team operates in multiple regions, you can override the organization time zone on a per-mailbox basis. This is helpful when, for example, your `support@` inbox is staffed in New York but your `eu-support@` inbox is staffed in London — response times, SLA timers, and business hours calculations will then reflect each mailbox's local time.
To set it:
1. Go to **Settings → Mailboxes** and click the mailbox you want to edit.
2. Scroll to the **Mailbox Time Zone** field.
3. Pick a specific time zone, or leave it set to **"Use organization time zone"** to inherit the default.
The same business hours schedule from your organization settings applies; only the time zone in which those hours are interpreted changes per mailbox.
Mailbox Time Zone
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