The most common months to get insurance are January/February and August/September. Is your insurance expiring?  Don’t worry, we can help you get a new one! We would like to offer you a special February discount! You can get almost 3 months of insurance for free!

(Since this article was published, prices have dropped even further! It now costs 4,500 CZK for one year of insurance).

http://blog.foreigners.cz/comprehensive-health-insurance-february-2015-discount/