Create custom weekly view for my sharepoint Lists

Hi guys,

i am trying to create two views on my sharepoint lists, the first view will only show information added to the list from the past week(i.e Mon - Sun)

and the other would only show info added to the list from the past month.

Would anyone kindly share formula's on how to achieve this, or pointer's on how i can do this.

I know i might have to create calculated coulmns on the list but besides that i'm pretty lost.

Thanks

Madubuko