title: Rust Chrono parse date String, ParseError(NotEnough) and ParseError(TooShort)
body: <p>How to convert a String to a <a href="https://docs.rs/chrono/0.4.11/chrono/struct.DateTime.html" rel="noreferrer">chrono::DateTime</a> or <a href="https://docs.rs/chrono/0.4.11/chrono/naive/struct.NaiveDateTime.html" rel="noreferrer">chrono::NaiveDateTime</a></p>
  
  <p>And what does the ParseError(NotEnough) or ParseError(TooShort) mean?</p>