If you do own a Kindle from Amazon, the Victor crew has some news for you. You will need to make sure you update it by tomorrow, March 22, 2016. What happens if you don’t? You will have to do it manually after that in order to access the Kindle Store or sync with the cloud. You won’t be able to download your books.
This is the warning you will receive from Amazon:
Your Kindle is unable to connect at this time. Please make sure you are within wireless range and try again. If the problem persists, please restart your Kindle from the Menu in Settings and try again. If you see this message on your device on or after March 22, you will need to manually install the latest software update for your device. Go to Fire & Kindle Software Updates for more details.
Here is the page you can find all the details: http://www.amazon.com/gp/help/customer/display.html/ref=help_search_1-6?ie=UTF8&nodeId=201994710&qid=1458317761&sr=1-6