Best Timing For Direct Mailings?

Has anyone noticed a specific day of the week or a certain time of the month that has been most effective for direct mail? So far for myself I noticed, at least locally, that there is a lot of bulk advertising mail received on Tuesdays. I observed that if I did my mailings on Mondays when most of the recipients get my mailing on Tuesday that my response rate wasn’t nearly as good. It probablly just got mixed with all the other “spam” and thrown away without any notice. As for the time of the month that is best, I’m still working on that one. I thought maybe near the beginning of the month when most people get the majority of their bills. I’m not sure though.

Opinions? Experiences?

I was told to mail on Thursdays, they will receive Saturday and mostly likely read it because it is the weekend.