> ## Documentation Index
> Fetch the complete documentation index at: https://docs.dentolize.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Why do appointments show an hour early or late?

> Appointments shifted by an hour on some devices are caused by the device's clock or time zone.

**Short answer:** the clock or time zone of that computer or phone is wrong; set its date and time to automatic, with your city's time zone, then reload Dentolize.

**1. Find the devices with the wrong time**

Open the same appointment on each computer and phone. If it's correct on some and wrong on others, the problem is in those devices, not in Dentolize.

**2. Fix the device clock**

In the device's date and time settings, turn on automatic date and time, and check that the time zone is your city's.

**3. Update the device**

Install pending Windows updates, or update the Dentolize app on the phone. Old versions can have outdated daylight saving rules.

**4. Reload Dentolize**

Refresh the page, or log out and back in, and check the appointment again.

> [!NOTE]
>
> Wrong on **every** device? The clinic's **Time Zone** is in **Settings → Clinic → Main**. It's set by Dentolize; send us a message in **System Chat** to change it.

**Full guide:** [Clinic and branches main settings](https://docs.dentolize.com/en/setup-settings/basic-branch-settings.md)

***

> [card] Still stuck?
>
> Send us a message in **System Chat** inside Dentolize with a screenshot, and tell us which step didn't work. Tip: next time, search this site first. Most answers take less than a minute.


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