Android:headerbackground Having No Effect

I'm currently working on creating a custom theme for a datePicker and I'm having some difficulty with setting the headerBackground and the circle around the selected date separatel

Solution 1:

I read the link posted by @DasserBasyouni and found that making the parent of my datePickerTheme @android:style/Widget.Material.Light.DatePicker and setting android:datePickerStyle to @style/State0DatePickerTheme in State0BaseTheme worked perfectly