collinmcnulty opened a new pull request #18071:
URL: https://github.com/apache/airflow/pull/18071


   The example dags all use a dynamic start date, but this is not good 
practice. In my experience, many people new to Airflow continue to use dynamic 
start dates in their real dags and it causes them problems. For example, they 
get into the habit of using `days_ago(1)` and that works for daily dags but not 
for anything less frequent than that.
   
   I assume the example dags use dynamic start date to keep from spawning many 
dagruns for anyone who chooses to run them. I propose that `catchup=False` be 
used for that purpose instead.
   
   This PR only covers the core airflow example dags, not all the providers. 
   


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