title: Most efficient way to calculate the first day of the current Financial Year?
body: <p>What's the most efficient way to calculate the first day of the current (Australian) Financial Year?</p>
  
  <p>The Australian FY begins on 01-July.</p>
  
  <p>E.g.</p>
  
  <p><code>SELECT dbo.FinancialYearStart('30-Jun-2011')</code> returns 01-Jul-2010.</p>
  
  <p><code>SELECT dbo.FinancialYearStart('01-Jul-2011')</code> returns 01-Jul-2011.</p>
  
  <p><code>SELECT dbo.FinancialYearStart('02-Jul-2011')</code> returns 01-Jul-2011.</p>