People are telling me that the IRS only sends checks on certain days of the week. What days are those, I've been waiting since last month for my tax check

Where's My Refund - It's Quick, Easy, and Secure. (http://www.irs.gov/individuals/article/0,,id=96596,00.html)

Use this handy online tool to figure out what happened to your refund.

You would have gotten your refund faster had you opted to have the refund directly deposited into your bank account versus having a paper check mailed to you.

The EFTs and mailing of checks happens every Friday.