The expression for Quartz cron trigger to run at every day at 00hr

1 Seconds 2 Minutes 3 Hours 4 Day-of-Month 5 Month 6 Day-of-Week 7 Year (optional field)

So in your case:

0 0 0 * * ?

This will fire at midnight, if you want to fire at noon:

0 0 12 * * ?

Or both:

0 0 0,12 * * ?

A good page if you want to get more complicated: http://www.quartz-scheduler.org/documentation/quartz-2.x/tutorials/tutorial-lesson-06

Have an awesome day!

You need to set TwoWay mode on MultiBinding explicitly:

<TextBlock.Text> 
    <MultiBinding Converter="{StaticResource valueToFormatedValueConverter}"
                  Mode="TwoWay">    
        <Binding RelativeSource="{RelativeSource TemplatedParent}" Path="Value" Mode="TwoWay" UpdateSourceTrigger="PropertyChanged"/> 
        <Binding RelativeSource="{RelativeSource TemplatedParent}" Path="StringFormat" Mode="TwoWay" UpdateSourceTrigger="PropertyChanged"/> 
    </MultiBinding> 
</TextBlock.Text>