How can I schedule a Task to execute at a specific time using celery?

Use

YourTask.apply_async(args=[some, args, here], eta=when)

And at the end of your task, reschedule it to the next time it should run.

The recently released version 1.0.3 supports this now, thanks to Patrick Altman!

Example:

from celery.task.schedules import crontab
from celery.decorators import periodic_task

@periodic_task(run_every=crontab(hour=7, minute=30, day_of_week="mon"))
def every_monday_morning():
    print("This runs every Monday morning at 7:30a.m.")

See the changelog for more information:

http://celeryproject.org/docs/changelog.html

While @asksol's answer still holds, the api has been updated. For celery 4.1.0, I have to import crontab and periodic_task as follows:

from celery.schedules import crontab
from celery.task import periodic_task

How you can read in this tutorial, you can make a PeriodicTask, i think if you have execute a task at 1 .am. Monday's morning is because you wan to run a long cpu/mem operation, rememeber celery use ampq for enqueue tasks.