# Date object September is missing?

**URL:** <https://forum.kirupa.com/t/date-object-september-is-missing/313459>\
**Category:** flash\
**Created:** [August 31, 2010, 10:12am UTC](https://forum.kirupa.com/t/date-object-september-is-missing/313459 "2010-08-31T10:12:23Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Swooter](https://avatars.discourse-cdn.com/v4/letter/s/e9a140/32.png) [@Swooter](https://forum.kirupa.com/u/Swooter)\
**Post date:** [August 31, 2010, 10:12am UTC](https://forum.kirupa.com/t/date-object-september-is-missing/313459/1 "2010-08-31T10:12:23Z")

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Hi guys!

Can somebody explain why the month September is not working in my example?

var $d:Date = new Date();  
$d.setMonth(7);  
trace($d); // Tue Aug 31 12:10:29 GMT+0200 2010  
$d.setMonth(8);  
trace($d); // Fri Oct 1 12:10:29 GMT+0200 2010 ??? makes no sense