Amazon Time Sync Service supports Microsecond-Accurate Time in Malaysia and Ohio Regions

The Amazon Time Sync Service now supports clock synchronization within microseconds of UTC on Amazon EC2 instances in the Asia Pacific (Malaysia) and US East (Ohio) regions. Built on Amazon's proven network infrastructure and the [AWS Nitro System](https://aws.amazon.com/ec2/nitro/), customers can now access local, GPS-disciplined reference clocks on supported EC2 instances. These clocks can be used to more easily order application events, measure 1-way network latency, increase distributed application transaction speed, and incorporate in-region and cross-region scalability features while also simultaneously simplifying technical designs. This capability is an improvement over many on-premises time solutions, and it is the first microsecond-range time service offered by any cloud provider. Additionally, you can audit your clock accuracy from your instance to measure and monitor the expected microsecond-range accuracy. Customers already using the Amazon Time Sync Service on supported instances will see improved clock accuracy automatically, without needing to adjust their AMI or NTP client settings. Customers can also use standard PTP clients and configure a new PTP Hardware Clock (PHC) to get the best accuracy possible. Both NTP and PTP can be used without needing any updates to VPC configurations. Amazon Time Sync’s microsecond-accurate time is available starting today in US East (Ohio), Asia Pacific (Malaysia), as well as [additional regions on supported EC2 instance types](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/configure-ec2-ntp.html#connect-to-the-ptp-hardware-clock). We will be expanding support to more AWS Regions. There is no additional charge for using this service. Configuration instructions, and more information on the Amazon Time Sync Service, are available in the [EC2 User Guide](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/set-time.html).