How can I calculate the dates between two dates in a specific year? : <p>I have a </p>

<p>Start_Date = 1988-04-01
End_Date =   2017-04-30</p>

<p>how can I calcuate the difference between two days in a specific year?
such as 2000 will have 365 days, 2017 will have 120 days.</p>

<p>how can I do that?</p>
