0 9 * * 1-5 means 09:00 Monday–Friday in a crontab. Paste it into Databricks (Quartz) or AWS EventBridge and it is either rejected or runs on the wrong days. A quick demo with the free DevToolBox Cron Converter : From (Unix) To Result Outcome 0 9 * * 1-5 Quartz 0 0 9 ? * 2-6 conditional (same timezone) 0 9 * * 1-5 EventBridge cron(0 9 ? * 2-6 *) conditional (rules run in UTC) 0 9 1 * 1 Quartz — unsupported: Unix runs on the 1st ...