Currently, Fivetran only allows for set time intervals or manual triggers for connector syncs. If someone wants to schedule a sync via cron, currently the only way to do so is to set the connector to manual sync and trigger via external API call (e.g. AWS Lambda function). Fivetran should create an enhancement in the scheduling of a connector to allow cron definitions For example: 55 8-16 * * 1-5 America/New_York, which translates to "At minute 55 past every hour from 8 through 16 on every day-of-week from Monday through Friday, EDT"