Sign Android APK with a certificate that expires further in to the future

Question

I have built an android app using phonegap build. I am now trying to get this on the play store but keep getting the following error

You uploaded an APK signed with a certificate that expires too soon. You need to sign your APK with a certificate that expires farther into the future

I have created the signing key with java jdk1.8.0 keytool and I have used this code

keytool.exe -genkey -v -keystore release.keystore -alias TicTacToe -keyalg RSA -keysize 2048 -validity 10000

I don't understand. As far as I can tell I am setting the date 10,000 days from now which should be plenty?

Answer 1

Set expiration to be greater than 50 years.

-validity 20000