"3rd thursday this November" is a day out.

[wjessop]

Trying a couple of other months these all work fine:

ruby-1.9.2-p0 > Chronic.parse('3rd thursday this October')
=> 2010-10-21 12:00:00 +0100
ruby-1.9.2-p0 > Chronic.parse('3rd thursday this December')
=> 2010-12-16 12:00:00 +0000

However November is a day out, it should be the 18th:

ruby-1.9.2-p0 > Chronic.parse('3rd thursday this November')
=> 2010-11-19 11:00:00 +0000

I get the same error in ruby 1.9.2p0 and 1.8.7p174. The only weird datey thing in the near future is a switch back from DST (GMT +1) to GMT in the next few days. December however works fine:

ruby-1.9.2-p0 > Chronic.parse('3rd thursday in December')
=> 2010-12-16 12:00:00 +0000

[dannyb]

I am running into a very similar problem. In some cases it works fine, but under some situations it goes off by a day. I created a gist showing the different scenarios that work and don't work.

It does appear to do with the switch of PST/PDT.

https://gist.github.com/672230