This has triggered interesting conversations internally. While we chalk out an action plan for your feature, I wanted to share with you about the AI Based anomaly detection system. Our AIOps Engine can detect seasonal anomalies that occur across monitors (in your case CPU spikes during a particular period) and can alert in case there is an anomaly. We collect 4 weeks of hourly performance data to train our data models for accuracy and we are constantly improving our models.
I do understand you want our alerting engine to avoid sending alerts based on the time period. However, when there is an abnormality during that time you may want us to send alerts. For this, I suggest you enable Anomaly alert and give it a try. Please do share your feedback.
Product Manager, Site24x7.