Weekly job executing after 6 days instead of 7

[joaopsys]

Environment

• Nautobot version (Docker tag too if applicable): 1.4.2
• Python version: 3.8.13

Steps to Reproduce

1. Schedule a weekly job in Nautobot
2. Let the job run twice
3. Notice how the difference between executions was only 6 days, instead of 7 days

Maybe there's a reason for this that I am just not seeing, but I fully expected my weekly job to execute exactly 7 days after the previous run, and not 6 days.

Check the following screenshot. I have a couple more jobs that behaved the same, i.e. executed after 6 days and not 7.

[lampwins]

@nautobot/core can we have someone setup a test to try to reproduce this?

[gsnider2195]

Confirmed. The scheduled job to_cron method is passing datetime.datetime.weekday() to celery.schedules.crontab.day_of_week

datetime.datetime.weekday:

Monday = 0

 |  weekday(...)
 |      Return the day of the week represented by the date.
 |      Monday == 0 ... Sunday == 6

celery.schedules.crontab.day_of_week:

Sunday = 0

     |  .. attribute:: day_of_week
     |  
     |      - A (list of) integers from 0-6, where Sunday = 0 and Saturday =
     |        6, that represent the days of a week that execution should
     |        occur.
     |      - A string representing a Crontab pattern.  This may get pretty
     |        advanced, like ``day_of_week='mon-fri'`` (for weekdays only).
     |        (Beware that ``day_of_week='*/2'`` does not literally mean
     |        'every two days', but 'every day that is divisible by two'!)
     |  

[gsnider2195]

day_of_week = (t.weekday() + 1) % 7

Here?

Another option

return schedules.crontab(minute=t.minute, hour=t.hour, day_of_week=t.strftime("%w"))