Here's why and how to fix it:
* "This" is not a proper subject. "This" refers to a specific thing or time, but it doesn't act on its own.
* "Will be" is a future tense verb, but it needs a subject. The subject should be something that can experience excitement, like "it" or "the month."
Here are some grammatically correct ways to phrase it:
* "This will be an exciting month for me." (This is the simplest and most natural way to say it.)
* "It will be an exciting month for me." (This emphasizes the future aspect.)
* "The month will be exciting for me." (This is a more specific way to say it.)
Let me know if you have any other questions!