Calendar Planner App

I would like to share you my Calendar Planning app design, hope you like it. I made this for our lab's challenge!
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The main color that I choose is black, to differentiate it from the colors that is available for the scheduled date. The CTA would be easy to spot in this way!⠀⠀⠀⠀⠀
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I would also love to hear some feedbacks if there are any!
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Thanks!