How do I get uniform font size in my app's calendar

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Mobile

Android

application

font

, +

I have a calendar_fragment;

<FrameLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
   
    <!-- TODO: Update blank fragment layout -->
    <TextView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginBottom="96dp">
    </TextView>
    <CalendarView
        android:id="@+id/calendar1"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginBottom="96dp"
        android:unfocusedMonthDateColor="@color/material_blue_grey_800"
        android:dateTextAppearance="@android:style/TextAppearance.Medium"
        android:selectedWeekBackgroundColor="@color/material_deep_teal_500"
        android:weekSeparatorLineColor="@color/material_deep_teal_500">
    </CalendarView>
</FrameLayout >

This shows up correctly in the Design tab of Android Studio, and I expected it to look the same on the phone, however when I run the App and navigate to the calendar fragment, the fonts size appears smaller,

CalendarWithSmallFont

I'm using GenyMotion for emulating the phone and for testing.

How do I fix this?