Errata patches for zic(8) and zoneinfo files have been released for
OpenBSD 7.7.

Update of timezone files is a machine-independent patch, so syspatches
for zoneinfo are made available for all architectures.

Binary updates for the amd64, arm64 and i386 platform are available
via the syspatch utility.  Source code patches can be found on the
respective errata page:

  https://www.openbsd.org/errata77.html