title: How to get the number of days in a month in Rust?
body: <p>Is there a idiomatic Rust way to get the number of days in a given month? I've looked at chrono but I haven't found anything in the docs for this.</p>
  
  <p>I'm looking for something that can manage leap years similar to <code>calendar.monthrange</code> in Python or <code>DateTime.DaysInMonth</code> in C# .</p>