User Agent Mozilla/5.0 (X11; Linux i686; rv:25.0) Gecko/20100101 Thunderbird/25.0a1 Lightning 2.7a1 BYMONTHDAY Rule parts which are bigger than the days in month should simplý be skipped. Here, the Whole month gets skipped. Reproducible: Always Steps to Reproduce: 1. create a recurring item with some days including the 31st 2. navigate to a month with less than 31 days. result: In this month none of the occurrences are shown. expected result: The occurrences earlier in the month should be shown.

This is caused by automatic normalization of the "last" date if this.last.date gets set > daysInMonth. In this case, the normalization function will increment the month.

Forgot to include one line in this patch ISO another one.

Comment on attachment 785426 [details] [diff] [review] Patch V1.1 Can you please add/update the tests to add a case for this?

I added a test to test_recur.js. to make the tests run on icaljs, the pref needs to be set and two tests have to be disabled, since they fail. To make this easier, I wrote a small patch [1] which can be found in my mq-patch repo [1]: http://hg.mozilla.org/users/Mozilla_Adrario.de/mq-patches/file/efbad47506ee/enable-icaljs-testing.diff

This bug is fixed upstream in ical.js. The tests will go into calendar with Bug 908745

Comment on attachment 789816 [details] [diff] [review] Patch V2 Landed upstream, removing review request.

Should be fixed by Bug 932217 in Lightning 3.2.