During the mentioned Time Frame, our Datacenter will be rolling out a global software update to improve networking performance and stability on our hypervisors. There should be minimal downtime on the affected hypervisor during the rollout.
This maintenance is being performed due to one of our Provider's Engineers discovering a bottleneck in our networking software stack. After the update, our hypervisors will be better able to handle higher network loads without network disruption.
The expectation is that most users will observe no impact, though some users with a sustained high-packets-per-second or high-throughput workload will see a small number of dropped packets.