diff --git a/docs/en-US/component/calendar.md b/docs/en-US/component/calendar.md
index 8182065faa..d8f20751de 100644
--- a/docs/en-US/component/calendar.md
+++ b/docs/en-US/component/calendar.md
@@ -69,3 +69,19 @@ Note, date time locale (month name, first day of the week ...) are also configur
 | pickDay                     | select a specific date                                                 | ^[Function]`(day: dayjs.Dayjs) => void`                                                       |
 | selectDate                  | select date                                                            | ^[Function]`(type: CalendarDateType) => void`                                                 |
 | calculateValidatedDateRange | Calculate the validate date range according to the start and end dates | ^[Function]`(startDayjs: dayjs.Dayjs, endDayjs: dayjs.Dayjs) => [dayjs.Dayjs, dayjs.Dayjs][]` |
+
+## Type Declarations
+
+<details>
+  <summary>Show declarations</summary>
+
+```ts
+type CalendarDateType =
+  | 'prev-month'
+  | 'next-month'
+  | 'prev-year'
+  | 'next-year'
+  | 'today'
+```
+
+</details>