created_at and completed_at timestamps can be specified during POST, though there are some guardrails. The system will flag orders with dates predating your FieldPulse account creation for audit purposes, which is generally fine but worth noting for compliance reporting.created_by_user_id — worth considering for compliance traceability.scheduled_date, started_at, and completed_at in ISO 8601 format with no restriction on historical dates. The system will flag these in audit logs with import attribution as Omar noted.