title: Does django_celery_beat support crontab schedules with multiple minutes/hours?
body: <p>I am using <code>django-celery</code> (<a href="https://pypi.python.org/pypi/django-celery/" rel="nofollow noreferrer">https://pypi.python.org/pypi/django-celery/</a>) to store celery beat (Periodic Task) schedules in the DB. But it doesn't support celery beyond version 3.1.25. I want to move to celery 4.1.0 and so I was looking at moving to <code>django-celery-beat</code> (<a href="https://pypi.python.org/pypi/django_celery_beat" rel="nofollow noreferrer">https://pypi.python.org/pypi/django_celery_beat</a>) for db based schedules.</p>
  
  <p>I was able to successfully migrate the table structures along with data. However, I see that django-celery-beat does not support crontab schedules with multiple minutes and hours which djcelery supported.</p>
  
  <p>For example, consider this crontab schedule - <code>15,30,45 0,1 * * *</code></p>
  
  <p>The task will run everyday at 12:15, 12:30, 12:45, 1:15, 1:30, 1:45. This used to work in django-celery. But in django-celery-beat, it only seems to execute at 12:15 (first instance).</p>
  
  <p>Old setup - <code>Django==1.10, celery==3.1.24, django-celery==3.1.17</code></p>
  
  <p>New setup - <code>Django==1.11.7, celery==4.1.0, django-celery-beat==1.1.0</code></p>
  
  <p>Can anyone confirm whether or not support for such crontab schedules has been dropped in django-celery-beat? If it is supposed to work, is it an issue with celery or django-celery-beat?</p>
  
  <p>Thanks</p>