title: Dynamic regex for date-time formats
body: <p>Is there an existing solution to create a regular expressions dynamically out of a given date-time format pattern? The supported date-time format pattern does not matter (Joda <code>DateTimeFormat</code>, <code>java.text.SimpleDateTimeFormat</code> or others).</p>
  <p>As a specific example, for a given date-time format like <code>dd/MM/yyyy hh:mm</code>, it should generate the corresponding regular expression to match the date-times within the specified formats.</p>