[Nexus 6 Themes and Apps] biglil1:
All credit to [MENTION=4619873]gharrington[/MENTION] for this clock mod, head on over to his thread to give thanks and for the guide on how to add to SystemUI. His thread: http://xdaforums.com/android/apps-games/3minit-clock-mod-v1-0-t3400221

I have compiled this and running for just under 24 hours without issue. There are a few errors that I got on first build so I'll list them here to help you make the appropriate changes.

1: Line 7 on gharrington's modded xml beginning with <FrameLayout doesn"t apply to our device do not add to your xml. If you do it'll throw an error, delete it if you all ready added it

2:Line 18 starting with <com.android.systemui.statusbar.policy.Clock add android:visibility="gone" in this line other wise you'll have the stock clock and the 3mint clock on the right side

3:Line 19, <com.android.systemui.statusbar.policy.MinitClock this line ends with

android:paddingStart="[COLOR="Red"]@dimen/status_bar_clock_padding_start[/COLOR]"

delete the red text and change to 7.0dip otherwise you'll have to add it into your dimen.xml for if you don't do one or the other it'll throw an error

4: For some reason I ended up with two lines of </com.android.keyguard.AlphaOptimizedLinearLayout> if this happens just delete one

If your still having problems here is my status_bar.xml for stock 30M:

<?xml version="1.0" encoding="utf-8"?>
<com.android.systemui.statusbar.phone.PhoneStatusBarView android:orientation="vertical" android:id="@id/status_bar" android:background="@drawable/system_bar_background" android:focusable="false" android:descendantFocusability="afterDescendants"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:systemui="http://schemas.android.com/apk/res/com.android.systemui"
xmlns:threeminit="http://threeminit.com">
<com.android.systemui.statusbar.policy.MinitClock threeminit:position="1" android:id="@+id/minitclock" android:gravity="center" android:layout_width="fill_parent" android:layout_height="fill_parent" android:singleLine="true" />
<ImageView android:id="@id/notification_lights_out" android:paddingBottom="2.0dip" android:visibility="gone" android:layout_width="@dimen/status_bar_icon_size" android:layout_height="fill_parent" android:src="@drawable/ic_sysbar_lights_out_dot_small" android:scaleType="center" android:paddingStart="6.0dip" />
<LinearLayout android:orientation="horizontal" android:id="@id/status_bar_contents" android:layout_width="fill_parent" android:layout_height="fill_parent" android:paddingStart="6.0dip" android:paddingEnd="8.0dip">
<com.android.systemui.statusbar.AlphaOptimizedFrameLayout android:orientation="horizontal" android:id="@id/notification_icon_area" android:layout_width="0.0dip" android:layout_height="fill_parent" android:layout_weight="1.0">
<com.android.keyguard.AlphaOptimizedLinearLayout android:id="@id/notification_icon_area_inner" android:layout_width="fill_parent" android:layout_height="fill_parent">
<com.android.systemui.statusbar.StatusBarIconView android:id="@id/moreIcon" android:visibility="gone" android:layout_width="@dimen/status_bar_icon_size" android:layout_height="fill_parent" android:src="@drawable/stat_notify_more" />
<com.android.systemui.statusbar.policy.MinitClock threeminit:position="2" android:gravity="left|center" android:id="@+id/minitclock" android:layout_width="wrap_content" android:layout_height="fill_parent" />
<com.android.systemui.statusbar.phone.IconMerger android:gravity="center_vertical" android:orientation="horizontal" android:id="@id/notificationIcons" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_alignParentStart="true" />
</com.android.keyguard.AlphaOptimizedLinearLayout>
</com.android.systemui.statusbar.AlphaOptimizedFrameLayout>
<com.android.keyguard.AlphaOptimizedLinearLayout android:orientation="horizontal" android:id="@id/system_icon_area" android:layout_width="wrap_content" android:layout_height="fill_parent">
<include layout="@layout/system_icons" />
<com.android.systemui.statusbar.policy.Clock android:textAppearance="@style/TextAppearance.StatusBar.Clock" android:visibility="gone" android:gravity="start|center" android:id="@id/clock" android:layout_width="wrap_content" android:layout_height="fill_parent" android:singleLine="true" android:paddingStart="7.0dip" />
<com.android.systemui.statusbar.policy.MinitClock threeminit:position="0" android:gravity="start|center" android:id="@+id/minitclock" android:layout_width="wrap_content" android:layout_height="fill_parent" android:singleLine="true" android:paddingStart="7.0dip" />
</com.android.keyguard.AlphaOptimizedLinearLayout>
</LinearLayout>
</com.android.systemui.statusbar.phone.PhoneStatusBarView>

Good Luck! Enjoy!