Cipher or key exchange error when trying ssh towards older Cisco switches and other older networking hardware.

You get an error like
Unable to negotiate with 10.1.1.2 port 22: no matching key exchange method found. Their offer: diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1

To get correct time-zone for a Cisco-device in sweden, you need to set the time-zone to CET for standard-time and CEST for summer-time Summer-time in sweden starts at the last sunday of March and ends in last sunday in october.