Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

Common practice for start/end date of balance sheet
One's paycheck typically has a YTD (year to date) number that will end on the latest check of the year. I am paid bi-weekly, and my first 2012 check was for work 12/25 - 1/7. So, for my own balance sheet, brokerage statements and stock valuations end 12/31, but my pay ended 12/24. And then a new sheet starts.