Summary

On 2026-06-02 Cloudflare added the ability to attach cron schedules directly to a Workflow binding in wrangler.jsonc. Each cron expression in the binding's schedules array automatically creates a new Workflow instance at the scheduled times, so you no longer need a separate Worker with a scheduled handler just to trigger a Workflow.

Example (in wrangler.jsonc):

{
  "workflows": [
    {
      "name": "my-scheduled-workflow",
      "binding": "MY_WORKFLOW",
      "class_name": "MyScheduledWorkflow",
      "schedules": [
        "0 * * * *",
        "*/15 * * * *",
        "0 9 * * MON-FRI"
      ]
    }
  ]
}

Key Points

• Configure cron expressions on the Workflow binding via the schedules array in wrangler.jsonc.
• Each scheduled entry spawns a new Workflow instance automatically—no separate Worker cron trigger required.
• Useful for recurring jobs (backups, invoice/report generation, aggregation, cleanup).
• You can attach multiple schedules (hourly, every-15-minutes, weekday-only) to the same Workflow.
• See the "Trigger Workflows" documentation for full details and edge cases.