| Prop | Type | Default | Description |
|---|---|---|---|
| locales | string | string[] | — | BCP 47 locale(s) for month/year formatting. Falls back to the Root locale. |
| options | Intl.DateTimeFormatOptions | — | Intl.DateTimeFormat options for customizing the output. |
| monthIndex | number | 0 | Which visible month to display (0-based). |