[Android Themes] nitinvaid:
DOCUMENTATION:-

What I Did Is

Assuming you know how to decompile and compile

in SystemUI.apk\res\layout\status_bar_expanded.xml

i modified so many things even i dont remeber exactly

if anyone need help in porting PM me

here's my status_bar_expanded.xml

<?xml version="1.0" encoding="utf-8"?>
<com.android.systemui.statusbar.phone.ExpandedView android:orientation="vertical" android:focusable="true" android:descendantFocusability="afterDescendants"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:systemui="http://schemas.android.com/apk/res/com.android.systemui">
<RelativeLayout android:background="@drawable/notification_header_bg" android:paddingTop="3.0dip" android:paddingRight="3.0dip" android:paddingBottom="5.0dip" android:layout_width="fill_parent" android:layout_height="52.0dip">
<com.android.systemui.statusbar.policy.Clock android:textAppearance="@style/TextAppearance.StatusBar.Expanded.Clock" android:id="@id/clock" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="8.0dip" android:singleLine="true" />
<com.android.systemui.statusbar.policy.DateView android:textAppearance="@style/TextAppearance.StatusBar.Date" android:gravity="left|center" android:id="@id/date" android:paddingLeft="5.0dip" android:paddingTop="2.0dip" android:layout_width="wrap_content" android:layout_height="fill_parent" android:singleLine="false" android:layout_toRightOf="@id/clock" />
<ImageView android:id="@id/settings_button" android:paddingLeft="250.0dip" android:layout_width="wrap_content" android:layout_height="fill_parent" android:src="@drawable/ic_notify_quicksettings" android:layout_alignParentLeft="true" android:contentDescription="@string/accessibility_settings_button" />
<ImageView android:id="@id/clear_all_button" android:paddingLeft="2.0dip" android:paddingRight="2.0dip" android:layout_width="wrap_content" android:layout_height="fill_parent" android:src="@drawable/ic_notify_clear" android:layout_toRightOf="@id/settings_button" android:contentDescription="@string/accessibility_clear_all" />
<Space android:layout_width="0.0dip" android:layout_height="0.0dip" android:layout_weight="1.0" />
</RelativeLayout>
<LinearLayout android:orientation="vertical" android:background="@drawable/notification_header_bg2" android:layout_width="fill_parent" android:layout_height="wrap_content">
<com.android.systemui.statusbar.powerwidget.PowerWidget android:id="@id/exp_power_stat" android:background="@drawable/notification_header_bg2" android:layout_width="fill_parent" android:layout_height="wrap_content" android:minHeight="@dimen/notification_panel_widget_height" />
</LinearLayout>
<View android:background="@drawable/status_bar_hr" android:layout_width="fill_parent" android:layout_height="2.0dip" />
<FrameLayout android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_weight="1.0">
<TextView android:textAppearance="@android:style/TextAppearance.Large" android:gravity="left" android:layout_gravity="top" android:id="@id/noNotificationsTitle" android:padding="8.0dip" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/status_bar_no_notifications_title" />
<ScrollView android:id="@id/scroll" android:fadingEdge="none" android:layout_width="fill_parent" android:layout_height="fill_parent" android:overScrollMode="ifContentScrolls">
<LinearLayout android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="wrap_content">
<com.android.systemui.statusbar.policy.NotificationRowLayout android:id="@id/latestItems" android:layout_width="fill_parent" android:layout_height="wrap_content" systemui:rowHeight="@dimen/notification_height" />
</LinearLayout>
</ScrollView>
<ImageView android:layout_width="fill_parent" android:layout_height="fill_parent" android:src="@drawable/title_bar_shadow" android:scaleType="fitXY" />
</FrameLayout>
</com.android.systemui.statusbar.phone.ExpandedView>

after that dont forget to add all png's from my systemui to yours

and in styles.xml

add

<style name="TextAppearance.StatusBar.Clock2" parent="@android:style/TextAppearance.StatusBar.Icon">
<item name="android:textSize">32.0dip</item>
<item name="android:textStyle">normal</item>
<item name="android:textColor">#ffffffff</item>
<item name="android:textAllCaps">true</item>
</style>
<style name="TextAppearance.StatusBar.Expanded" parent="@android:style/TextAppearance.Small.CalendarViewWeekDayView" />
<style name="TextAppearance.StatusBar.Expanded.Clock" parent="@style/TextAppearance.StatusBar.Expanded">
<item name="android:textSize">32.0dip</item>
<item name="android:textStyle">normal</item>
<item name="android:textColor">#ffffffff</item>
</style>
<style name="TextAppearance.StatusBar.Expanded.Date" parent="@style/TextAppearance.StatusBar.Expanded">
<item name="android:textSize">12.0dip</item>
<item name="android:textStyle">normal</item>
<item name="android:textColor">#ffcccccc</item>
<item name="android:textAllCaps">true</item>
</style>

and in Strings.xml

find "status_bar_date_formatter"

change it to exact

<string name="status_bar_date_formatter">"%1$s
%2$s"</string>