Starting on March 1, 2018, you will no longer be able to purchase 3-year SSL certificates. This change is being enforced by the Certificate Authority/Browser Forum (CAB Forum), which is more or less a regulatory body made up of CAs and Browser.
So, starting March 1, two years is the maximum lifespan that you can get with any SSL certificate. This change doesn’t affect EV certificates, as two years (825 days) was already the longest allowable validity period, owing to the level of trust (the unique green bar indicator) that EV SSL receives.
More information about this can be found on our blog.
