Responsive landing page using flexbox and one media query

What are you most proud of, and what would you do differently next time?

I am most proud of all the logic behind this form validation, if something is empty, in the future, etc.

What challenges did you encounter, and how did you overcome them?

My main challenges here were interacting with new Date();, since it was the first time i used it and didn't really know what could i do with it, so I just googled it up and managed to use it to my needs, but that wasn't actually that hard. However making the validations for each input was kinda complicated, but after trying some things, i could easily figure out the answer.

What specific areas of your project would you like help with?

I would like help on anything that anyone considers that I made wrong, or I could improve, mostly on JS.