I know, I know you don’t need this. You run your very own local GPS-synced Stratum 1 NTP server, probably on a Raspberry Pi…
But other ICOM users might be interested to discover that the company has released ST-4003W, a Windows application that permits setting transceiver time from your PC’s time.
Compatible radios (as of November 2021):
Usual caveats; RTFM before installing, don’t tug on Superman’s cape or spit into the wind, etc. etc.