everyone has feel it...

New school semester: 
user posted image

At the first week:
user posted image

At the second week: 
user posted image

Before the mid-term test:
user posted image

During the mid-term test:

user posted image

After the mid-term test:
user posted image

Before the final exam:
user posted image

Once know the final exam schedule:
user posted image

7 days before final exam:
user posted image

6 days before final exam:
user posted image

5 days before final exam:
user posted image

4 days before final exam:
user posted image

3 days before final exam:
user posted image

2 days before final exam:
user posted image

1 day before final exam:
user posted image

After the final exam, during the holiday:
user posted image