Function getWeekNumber

getWeekNumber(date: Date): number
Calculates the ISO week number for a given date.
Parameters
- date: Date
  The date object to calculate the week number from.
Returns number
ISO week number (1–53).
Example
```
getWeekNumber(new Date(2025, 6, 23)); // e.g., 30
```
- Defined in date/get.ts:51