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					Originally Posted by  joegearhart
					 
				 
				I'm setting up Calibre to work with the Kindle that I'm giving my wife on Christmas. 
 
I wanted to create a custom date field called "Date Read", and did so with no problems. 
 
Well, then I wanted to set up some custom searches related to that. To do so, I had to put in some dummy dates on a few books so that I could make sure the searches operated as expected. 
 
#dateread:<2010 
#dateread:<2010-05 
#dateread:false 
#dateread:true 
 
These all worked PERFECTLY! 
 
But now that I want to clear the date fields, I can't find a way to do so! I can only edit the "date read" field. I can't clear it out again. 
 
I have tried deleting the value, right clicking and selecting "cut", I've gone to "Edit Metadata" > "Edit Metadata Individually" > "Custom Metadata" and tried to delete it there but just can't do it. 
 
Is this a bug or am I missing something very simple? 
			
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 Set a date with the year 0000  

I also think 0101, but that might have changed