title: How to use a Django validator to limit dates to 1900 or greater
body: <p>I found <a href="https://github.com/django/django/commit/e15567bf58" rel="nofollow">this commit</a> showing the <code>_datere</code> pattern now requires a date > 1900 but ... when I look into <code>django.core.validators</code> today I don't see anything like this (the commit linked to above does say it's from 7 years ago).</p>
  
  <p>What happened to this validation in django and what are people using today in Django 1.4.1 to get this type of validation?</p>
  
  <p>I'm asking this because of the strftime error:</p>
  
  <pre><code>"ValueError('year=1800 is before 1900; the datetime strftime() methods require year &gt;= 1900',)"
  </code></pre>
  
  <p>Thank you!</p>