When working with Axxon Next, the user can choose the type of calendar used (Gregorian or Persian).

To select the interface language, complete the following steps:

1. Go to Settings → Options → Regional settings (1–2).
   
2. Select the calendar type that is used in Axxon Next from the calendar drop-down list (3). The short and long forms of dates are also displayed in their respective fields (4).
3. Click Apply to save the changes.
4. Restart Axxon Next.

The newly selected calendar type will be applied once Axxon Next is restarted.