如何更改DatePickerDialog year文本大小？

<style name="CustomDatePickerDialog" parent="Theme.AppCompat.Light.Dialog">
    <item name="android:datePickerStyle">@style/CustomDatePicker</item>
</style>

<style name="CustomDatePicker" parent="android:Widget.Material.DatePicker">
    <item name="android:datePickerMode">spinner</item>
    <item name="android:spinnersShown">true</item>
    <item name="android:calendarViewShown">false</item>
</style>

DatePickerDialog datePickerDialog = new DatePickerDialog(context, R.style.CustomDatePickerDialog, new DatePickerDialog.OnDateSetListener() {
    @Override
    public void onDateSet(DatePicker view, int year, int month, int dayOfMonth) {
        // 日期选择回调
    }
}, initialYear, initialMonth, initialDay);