After rebuilding two MDS9148, I wanted them to correctly switch the summer/winter time for my time zone. Currently I’m in CET (or CEST during the summer), so I googled for that. The search came up with Cisco-FAQ, however that needed a slight adjustment.
Apparently the NXOS doesn’t support the feature “recurring” in the clock configuration. So I had to slightly adapt the configuration line:
clock timezone MET 2 0
clock summer-time MET 5 Sun Mar 02:00 5 Sun Oct 03:00 60