If you change the time zone from Administration >> Time the device will reboot and changing other option might terminate your login session but will not reboot the device.
If you change the time zone from Administration >> Time the device will reboot and changing other option might terminate your login session but will not reboot the device.
No, if you are only changing the NTP configuration to use custom NTP server and sync the time, the firewall won't need a reboot and it won't affect HA.
But you would need to disable HA to change the Time Zone and it will require a reboot -