We use a stratum-1 server in our data center to synchronize our different application servers. To sync your servers with our servers you can use either your own stratum-1 server or with a trusted, publicly available one that is close to your data center.
Even though we synchronize our servers with a stratum 1 clock, drift can always cause a slight time difference between our respective servers. If you attempt to register a domain name at the opening of GA and receive the missing required charge agreement extension, we recommend that you re-attempt the domain registration immediately.
Some registrars spend a great deal of time optimizing their technology and processes for the start of GA and other “drop-like” events. It is a highly competitive environment. And we would encourage you to do the same.