Mendix automatically provides a way to manage Scheduled Events without the need of additional constants. You can access the Sprintr Environment → App you want to manage → Environments → Click on Details for the Environment → Model Options tab → Scheduled events.
Here, you can toggle Events on/off. All scheduled events are listed here. Please note that you still need to restart your application for any new values to take effect.
You can let the scheduler run a microflow.
In this microflow the first thing to add is a Decision.
In this Decision you can check if a value of a constant is true/false (or any other logic (for example time interval)