Since Parallels is Odin, the following message appears when dist-upgrade:
Failed to fetch http://download1.parallels.com/WPB/Standalone/12.0/dist-deb-Debian-7.0-x86_64/Release.gpg Unknown date format [IP: 199.115.105.4 80]
Failed to fetch http://download1.parallels.com/WPB/Standalone/12.0/dist-deb-Debian-7.0-x86_64/en Unknown date format [IP: 199.115.105.4 80]
WPB Standalone.
Failed to fetch http://download1.parallels.com/WPB/Standalone/12.0/dist-deb-Debian-7.0-x86_64/Release.gpg Unknown date format [IP: 199.115.105.4 80]
Failed to fetch http://download1.parallels.com/WPB/Standalone/12.0/dist-deb-Debian-7.0-x86_64/en Unknown date format [IP: 199.115.105.4 80]
WPB Standalone.