kernel needs to put a date/time-stamp in the log at boot

The log as output by dmesg does not contain the date-time of last boot. This seems a serious oversight. Surely, the kernel is able to query the clock? Knowing the exact date-time could be crucial in cases of repeated reboots.

Anyway, a date-time stamp would seem a reasonable requirement from an auditing perspective.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-5.8.0-41-generic 5.8.0-41.46~20.04.1
ProcVersionSignature: Ubuntu 5.8.0-41.46~20.04.1-generic 5.8.18
Uname: Linux 5.8.0-41-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.16
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Tue Feb 9 13:32:23 2021
InstallationDate: Installed on 2021-01-14 (26 days ago)
InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
SourcePackage: linux-signed-hwe-5.8
UpgradeStatus: No upgrade log present (probably fresh install)