All that complaining about "Issued certificate not yet valid" got me to thinking: What day does the system think that it is?

genesco1:~ # date
Thu Jul  5 22:54:46 PDT 2012
Wow - So I guess that I'll need to set the system clock correctly:

genesco1:~ # /etc/init.d/ntp status
Checking for network time protocol daemon (NTPD):    unused

genesco1:~ # date -s '5 Feb 2016 16:18:00'
Fri Feb  5 16:18:00 PST 2016

genesco1:~ # date
Fri Feb  5 16:18:04 PST 2016
Now zypper functions without complaint:

genesco1:~ # zypper update
Refreshing service 'nu_novell_com'.
File '/repodata/repomd.xml' not found on medium ''

Abort, retry, ignore? [a/r/i/?] (a): i
Error retrieving metadata for 'ATI-Driver-SLE11-SP1':
File '/repodata/repomd.xml' not found on medium ''

Warning: Disabling repository 'ATI-Driver-SLE11-SP1' because of the above error.
Retrieving repository 'SLED11-SP1-Updates' metadata [done]
Building repository 'SLED11-SP1-Updates' cache [done]
Loading repository data...
Reading installed packages...


3 packages to upgrade, 1 new, 1 to remove.
Overall download size: 788.0 KiB. After the operation, 117.0 KiB will be freed.
Continue? [y/n/?] (y): n