3512649 - Maintenance window for SAP Datasphere

Is it possible to adjust/change maintenance window of SAP Datasphere? 

SAP Datasphere 

Maintenance window

Maintenance window dates and time are contractually fixed and cannot be changed. 
The experienced downtime depends on the type of maintenance activity performed in tenant. 
In a Datasphere's HANA Cloud upgrade the tenant would be unavailable, while other activities should be downtime-free.
Datasphere's HANA Cloud upgrade is performed during Datasphere's MW, not in HC Major Upgrade. 

Refer to SAP Datasphere's Maintenance Window details as it relies on other SAP Cloud services in addition:

(1) These Major Upgrade Windows are separate from and in addition to Major Upgrade Windows of underlying SAP Business Technology Platform.

(2) These Maintenance Windows are separate from and in addition to Maintenance Windows of underlying SAP HANA Cloud.

(3) These Maintenance Windows are separate from and in addition to Maintenance Windows of underlying SAP Data Intelligence.

Blue/Green Deployments

Wave delivery is usually performed during week in fixed dates, as per SAP Note 2984828 - SAP Datasphere Release & Delivery Schedule.
Important to highlight: Datasphere Wave deployment is downtime-free.
Datasphere's microservices are upgraded once for all tenants in a landscape. Therefore it is not possible to perform/request a tenant specific upgrade.

KBA , DS-PROV , DWC Provisioning , DS-DI , Data Integration/Data Builder , Problem