Description: The event time processing model in distributed stream processing systems defines how events are managed based on their timestamps. This approach allows systems to process data streams in real-time, taking into account when events occur rather than when they are received by the system. This is crucial in applications where the order and timing of events are fundamental, such as real-time data analysis, fraud detection, or system monitoring. Systems using this model assign timestamps to events, enabling operations like time windows, joins, and time-based aggregations. Additionally, the event time model is complemented by mechanisms for handling delays and out-of-order event arrivals, making it robust against real-world situations where data may arrive out of sequence. This model is essential to ensure that processing results are accurate and reflect the temporal reality of events, making it a powerful tool for developers and analysts working with large volumes of real-time data.