Default Locale Impact

See the answer below.

The format of date and number fields.

The default locale impacts various aspects of the Salesforce org, including the formatting of dates, times, numbers, and currencies, as well as the language of system-generated messages, labels, and error messages. It determines how these elements are displayed to users in their local language and format.

For example, if the default locale is set to English (United States), all dates, times, numbers, and currencies will be displayed in the format commonly used in the US, and system-generated messages and labels will be in English. If the default locale is changed to German (Germany), these elements will be displayed in the format commonly used in Germany, and system-generated messages and labels will be in German.

It's important to note that changing the default locale can affect the behavior of some features, such as search, which relies on the language and locale settings to provide accurate results. Additionally, changing the default locale can impact third-party integrations and apps that rely on the org's locale settings.

Overall, the default locale plays a crucial role in ensuring that users can interact with the Salesforce org in their preferred language and format, making the platform more accessible and user-friendly.