International NTP Servers

Apple:

time1.apple.com

time2.apple.com

time3.apple.com

time4.apple.com

time5.apple.com

time6.apple.com

time7.apple.com

Google:

time1.google.com

time2.google.com

time3.google.com

time4.google.com

Cloudflare:

time.cloudflare.com

Notes

Network Reachability: Before use, please ping the corresponding domain names to check network accessibility and the respective access speeds.

Synchronization Interval: It is recommended to set the synchronization interval to 24 hours or 1 hour to ensure time accuracy.