Configuring HA Pair to use NTP in different time zones
Our HA pair must be on the same time zone to ensure proper Synchronization. If your Primary and Replica are in different time zones, the Primary's time zone should be the one they are both set to.
If you are going to use an NTP server to sync both appliances, you should configure both of them to point to the NTP server.
DNS names will work as long as you have DNS servers configured in your Network Settings and you have confirmed that it is resolving properly. If you prefer to use IP addresses, resolution is not an issue.
NTP Servers do not replicate between Primary and Replica. Each appliance must be configured individually.