title: What's the regex for date range format like January 1 - 31, 2018?
body: <p>I am reading date range/ period value using C#. The usual format is mm/DD/YYYY - mm/DD/YYYY.</p>
  
  <p>But the period is some times formatted like January 1-31,2018 or February 1-28,2018.</p>
  
  <p>What's the regular expression to identify these occurrences ?</p>