Adding365DaysPerYear.qhelp

<!DOCTYPE qhelp PUBLIC
  "-//Semmle//qhelp//EN"
  "qhelp.dtd">
<qhelp>
<overview>
  <include src="LeapYear.inc.qhelp" />

<p>When performing arithmetic operations on a variable that represents a date, leap years must be taken into account.
It is not safe to assume that a year is 365 days long.</p>
</overview>

<recommendation>
<p>Determine whether the time span in question contains a leap day, then perform the calculation using the correct number
of days.  Alternatively, use an established library routine that already contains correct leap year logic.</p>
</recommendation>

<references>
  <li>NASA / Goddard Space Flight Center - <a href="https://eclipse.gsfc.nasa.gov/SEhelp/calendars.html">Calendars</a></li>
  <li>Wikipedia - <a href="https://en.wikipedia.org/wiki/Leap_year_bug"> Leap year bug</a> </li>
  <li>Microsoft Azure blog - <a href="https://azure.microsoft.com/en-us/blog/is-your-code-ready-for-the-leap-year/"> Is your code ready for the leap year?</a> </li>
</references>
</qhelp>