What is a typical lead time for EC2 scheduled event?

Question

We are responding to a RFP.

Customer would like to know what is a typical lead time for EC2 Scheduled Events? 
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/monitoring-instances-status-check_sched.html

Azure has a lead time of 30 days unless it is urgent.

==  Source: https://docs.microsoft.com/en-us/azure/virtual-machines/maintenance-and-updates  ===
If maintenance requires a reboot, you're notified of the planned maintenance. Azure also provides a time window in which you can start the maintenance yourself, at a time that works for you. The self-maintenance window is typically 30 days unless the maintenance is urgent. Azure is investing in technologies to reduce the number of cases in which planned platform maintenance requires the VMs to be rebooted.

Josh_Levinson_AWS · Accepted Answer

Our typical lead time is 14 days for non-critical scheduled events this includes instance reboots and retirements. Customers can also use the Flexible Maintenance feature to reschedule their scheduled maintenance events 14 days after the scheduled event. So all in all it will be 4 weeks window if they decide to use flexible maintenance.

There are certain critical events when the notice period might decrease and flexible maintenance won’t be available.

Customers can also automate responses to types of events: https://docs.aws.amazon.com/health/latest/ug/cloudwatch-events-health.html#automating-instance-actions

What is a typical lead time for EC2 scheduled event?

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