Can I put the date of today in a label without binding it in XAML, something like
<Label Text="DateTime.Now, StringFormat='{0:MMMM dd, yyyy}'"/>
Can I put the date of today in a label without binding it in XAML
No, you can't.
For Binding, use
xmlns:sys="clr-namespace:System;assembly=mscorlib"
with
<Label Content="{Binding Source={x:Static sys:DateTime.Now}, StringFormat='{0:MMMM dd, yyyy}'}" />
Though, you can set it from Code behind like myLabelControl.Content = DateTime.Now;
, but I would totally avoid this.