A quick Google search does seem to confirm this and at reputable sources such as Psychology Today and the Mayo Clinic. However that should not be a reason to dismiss increased awareness especially as an outreach to those experiencing depression and suicidal thoughts. In other words, it's always a good time to talk about it and to try to help. If the holidays increase awareness and get people talking about it I don't see that as a bad thing even if there isn't a statistical increase in suicide.

Edit: typo and formatting