Yes. The crontab you specified is not "standard". Airflow's crontab supports classic cron specification: (example here) https://www.adminschoice.com/crontab-quick-reference Custom timetable is the right way to go for you. You can also run the DAG every Friday and short-circuit it based on a Python code calculating if this is not the last Friday, but custom crontab will be nicer to see only the valid dates running.
J On Mon, Apr 10, 2023 at 5:54 PM Leonard Walstad <leonard.wals...@astronomer.io.invalid> wrote: > Dipayan; > > This looks like a good use of a timetable if you use Airflow 2.2 or > above: > https://airflow.apache.org/docs/apache-airflow/stable/authoring-and-scheduling/timetable.html > > If using an earlier version, you might schedule for every Friday and check > to see if it is the last Friday in a ShortCircuitOperator and discontinue > the pipeline: > > > https://registry.astronomer.io/providers/apache-airflow/versions/latest/modules/shortcircuitoperator > > Regards, > Leonard > > > > Leonard Walstad > Principal Architect / Customer Success > > Astronomer.io <https://astronomer.io/> > leonard.wals...@astronomer.io > 617.320.4854 > > > On Mon, Apr 10, 2023 at 11:09 AM Dipayan Dev <dev.dipaya...@gmail.com> > wrote: > >> Hi Team, >> >> I have a requirement to schedule the Airflow DAG on the last Friday of >> every month. >> >> I was using this cron expression which works on Linux : 0 00 16 ? * 6L. >> But it throws a DAG import error: >> *Invalid timetable expression: [0 00 16 ? * 6l] is not acceptable.* >> >> >> Can anyone please help on how to set the scheduler? >> >> >> >> With Best Regards, >> >> Dipayan Dev >> >>
