title: What is the equivalent of this query in Django Filter
body: <p>What is the equivalent of this query in Django Filter</p>
  
  <p>I need to get email address of the people having birthday today.</p>
  
  <pre><code>select email from lp7ms_coworker_data where Extract(month from dob)=EXTRACT(month FROM CURRENT_DATE) and Extract(day from dob)=EXTRACT(day FROM CURRENT_DATE)
  </code></pre>
  
  <pre><code>class CoWorker_Data(models.Model):
      name = models.CharField('Name', max_length=50, help_text='Co-worker name.')
      email = models.EmailField('Email', help_text='Co-worker email.')
      address = models.TextField('Address', help_text='Co-worker address.')
      phone = models.CharField('Phone Number', max_length=20, help_text='Co-worker phone number.')
      companyName = models.CharField('Company Name', max_length=80, help_text='Co-worker company name.', null=True,
                                     blank=True)
      workingLocation = models.CharField('Working Location', max_length=50,
                                         help_text='Co-worker working '
                                                   'location.')
      workingShift = models.CharField('Working Shift', max_length=50, help_text='Co-worker working shift.', default='')
      workingSpace = models.CharField('Working Space', max_length=50, help_text='Co-worker working space.', default='')
      teamMembers = models.CharField('Team Members', max_length=15, help_text="Co-Worker's Team Size.", default='')
      coworkerPicture = models.ImageField('Co-Worker Picture', upload_to='../media/images/co-woker-pictures'
                                          , help_text='Co-worker Picture.', default='', null=True, blank=True)
      joiningDate = models.DateField('Joining Date', help_text='Joining Date of Co-worker',
                                     default=datetime.datetime.today, )
      dob = models.DateField('Date of Birth', help_text='Date of Birth of Co-worker',
                             default=datetime.date.today, )
  
  
  </code></pre>