The Week Number in iOS on Sunday is not right

App Inventor for iOS
1

Only in iOS and only on Sunday the function

blocks(1)returns a wrong Week Number (returns a week number + 1). In others days is right.

Workaround:

blocks
blocks2014×376 58.6 KB

2

Week number is tricky.

I remember the aggravation from the last time it popped up on this board.

Search.

3

You are right. The format ISO 8601 is not easy.