How to connect DimDate table to fact and dimensional tables

Question

Hi,

I have fact table,Dim project , Dim student & Dim date tables in the power BI model.

• Fact contains studentid,projectid,is submitted, submitted date ,marks
• Dim student contains studentid,joining date, name
• Dim project contains projectid, project creation date, project type

As the requirement I want to showcase following points in one dashboard.

1. Marks based on student joining date
2. Marks based on project creation date
3. Marks based on submitted date

Using one year & month filter using  Dim Date table. Following is the power bi model that I created ,

So as this,Dim student & dim date / Dim project & dim date relationship is not active.

How I solve this in order to answer above requirements? Is this power bi model is correct or not?

Looking for a reply.Thanks in advance.