How do I tweet the same thing everyday?

[yusuf]

I have a blog that automatically updates it's twitter account everyday. If there are 10 new posts on it, it automatically shares them on twitter. I use twitterfeed for this. But I want to post "Good morning" (or something like that) everyday at 9 pm. Do you know any tool that can do that? Because it's easy to take posts automatically, but I just want to post the same thing everyday, and I don't want to schedule it for every time, I want to schedule it once, and want it to be updated without an effort.