Dynamic thresholds and anomalies are closely related. Dynamic thresholds are the thresholds that are learned after 7 days and establish tighter bands over the following 4 or so weeks. When a measurement value drops outside that dynamic threshold, THEN it becomes an anomaly alarm. If a value falls within that dynamic threshold, it is not an anomaly. So your recurring data (doesn't matter what time specifically, it just matters if it's a pattern vC Ops can match an algorithm to expect/predict it) that has become established a dynamic threshold won't be considered an anomaly. However, if you've got measurement values that occurs ad-hoc or irregularly, it'll likely pop up as an anomaly alarm.
If you want to test anomalies.. simply make a value (metric value) fall outside the dynamic threshold (indicated by grey band on graphs). vC Ops will call it out.