title: Calculate Number of Months and Days until Birthday
body: <p>I have a list of everyone's birthdays like below where <code>today</code> is <code>2022-09-09</code>.</p>
  <pre><code>Birthday
  January 15
  July 1
  December 25
  </code></pre>
  <p>How do I create a formula in google sheets where regardless of the year, I can figure out how many months are days are left before the birthday values?</p>
  <p>It gets tricky because July 1 we know has already passed since it is September.</p>
  <p>I would like to ideally do this in google sheets.</p>