This is a very basic scenario to implement. Describing each step to implement a full application will be quite difficult here.
If you are completely new to Mendix, you should follow some beginner learning paths in the Mendix Academy. After that you will be able to implement the application you have described above
After going through initial tutorials, if you are stuck any where then you may post a specific query on the forum
there are many options here, this one will work across all.
from your entity settings use from the access rules, define a new rule, select all your user roles then use the xpath to constraint the date to >0