Using the NTP service on OPNsense to get local time, and then all devices on the network pull from OPNsense to sync time.
Time Servers:
- us.pool.ntp.org
- time.cloudflare.com
- time.nist.gov
Settings:
DHCP Settings
DHCP option NTP servers set to LAN interface IP. This will provide NTP to the clients when they request IP address.