First off you will get a syntax error. I will assume that month is set somewhere else in the code.
So the first statement which will be similar to other month comparison statement would look something like this.
IF month in ['November', 'December', 'January', 'February'] then ...
Not sure what the {Name} field is, but the first statement that is true, then it fall out (and no semicolons except at the end of the main if statement. But I will need more time to look at your logic (because your if statements are redundant, everything is crRed).