The Amazon Time Sync Service provides a highly accurate and reliable time reference that is natively accessible from Amazon EC2 instances.
Leap seconds are known to cause application errors, and can be a concern for developers and system administrators. The Amazon Time Sync Service automatically smooths out i.e. smears leap seconds that are periodically added to UTC, so that customers do not have to worry about application errors due to leap seconds.
The Amazon Time Sync Service is available starting today in all AWS public regions.