January $$23$$, $$2019$$ can be written as $$8$$-digit date format $$23/01/2019$$. September $$2$$, $$2019$$ can be written as $$8$$-digit date format $$02/09/2019$$. How many digit "$$3$$" are there in all $$8$$-digit dates of the year $$2019$$? 
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