title: Java calculate days in year, or between two dates
body: <p>Is there a method in any native Java class to calculate how many days were/will be in a specific year? As in, was it a <a href="https://en.wikipedia.org/wiki/Leap_year" rel="noreferrer">Leap year</a> (366 days) or a normal year (365 days)?</p>
  
  <p>Or do I need to write it myself?</p>
  
  <p>I'm calculating the number of days between two dates, for example, how many days left until my birthday. I want to take into account the February 29 of Leap year. I have it all done except that 29th.</p>