I was searching info for 16.04.3 LTS (for Kubuntu & Xubuntu). It was great to find out about the cool features of those Ubuntu distributions.
However, I found something unusual; the EOL date of both is on April 2019, the exact same date as Trusty, not on the official EOL by Canonical, which is on April 2021.
Kubuntu (EOL date: April 2019):
Xubuntu (EOL date: 3 years after release, April 2016 + 3 yrs = April 2019):
Ubuntu (EOL date: April 2021, official date by Canonical):
Can someone tell me why the EOL date of both is sooner than the official Ubuntu one?