Networking - Public Time Servers

Here is a link to some Public Time Servers:

http://www.eecis.udel.edu/~mills/ntp/clock1a.html

Here is a great suggestion offered by Kurt K. (Thanks)

Use NTP Pools. Each one of those automatically directs to a random time server (in the US) registered with that pool. That way, you don’t have to worry about a particular server going offline. Just use the pool address and you’ll never have to worry about unavailable time servers again. You could drop the .us part (0.pool.ntp.org, 1.pool.ntp.org), but that would redirect to a random time server *anywhere*. I use the US pools to reduce latency.
0.us.pool.ntp.org
1.us.pool.ntp.org
2.us.pool.ntp.org