How to group blended data by week or month in Looker Studio?

I can't group blend data by year or month in Looker Studio. When I tried to change day (original data type) to year, data remains at the date level, and the year gets repeated on every single line. Same will apply to line charts, bar charts.

MariaReynaFlore_3-1730069647103.png

 

MariaReynaFlore_1-1730069514278.png

MariaReynaFlore_2-1730069566678.png

MariaReynaFlore_4-1730069684648.png

 

@sam8 

 

 

1 4 1,129