X-axis keep adding time to date

Hi

I hope somebody can help me. 

I have a very simple graph with date i the x-axis and the values is a sum of minutes. 

The minutes is given as numbers in data and is not calculated, but the x-axis keep adding time to the date as in the picture. 

I have made sure that the date column is of type date and has the wanted format. 

If i make the graph a little smaller it removes the time but i do not want it to be so small. 

Hope there is somebody there can helt me!!