Translation:Tomorrow is Thursday.
I don't know about this course, but you usually/often get one typo (such as transposing two adjacent letters) allowed in other courses (provided it does not create another valid word) but yours has effectively two typos and the computer algorithm cannot cope with that. The computer would lose the plot trying to keep track of all possible multiple-letter spelling errors and differentiate them from actual mistakes. That would be almost impossible.
However it would be possible for the moderator to allow your misspelt word if they thought it was a common enough error, but even then they would have to allow everyone else's common spelling errors for every word .......aaaargh!
They just say "4th day of the week", "5th day of the week" and "5th month" instead of your usual "Thursday", "Friday" or "May". They count to 6 starting on Monday and use "sun" or "day" (天/日) for Sunday.
(Definitely raises the question about whether or not they believe Thursdays are unlucky days...)