Would it be possible to schedule a horizontal autoscaling while using HPA?

[NMZ0429]

I am currently using HPA to configure autoscaling as explained in official docs.
My question is whether it is possible to increase the values of minReplicas and max Replicas at scheduled time like CronJob so that the server can withstand an expected CPU spike. According to the discussion, Rollouts supports external metrics but I simply want to upscale pods based on the time.

I am new to k8s and Argo Rollouts so any help would be much appreciated.

Example HPA Setting

apiVersion: autoscaling/v1
kind: HorizontalPodAutoscaler
metadata:
  name: hpa-rollout-example
spec:
  maxReplicas: 6 # I want to configure this value at scheduled time
  minReplicas: 2 # I want to configure this value at scheduled time
  scaleTargetRef:
    apiVersion: argoproj.io/v1alpha1
    kind: Rollout
    name: example-rollout
  targetCPUUtilizationPercentage: 80

[kostis-codefresh]

I think this question is for HPA and not specific to Argo Rollouts

In general though, the whole point of having HPA is to automatically scale without human intervention.
If you start tampering with settings like this what is the point of having HP at all?