@david Yeah. In this case, the server spend a year or two behind my Tor-ified network. No UDP support behind Tor.
@lattera oof... yeah. at one point (because Irix) I wrote a dead simple C program to call adjtime(2) natively with bespoke hand crafted artisanal timevals 😆
@lattera I use ntpdate -B *always*. Sometimes it takes weeks or months (or until a reboot)