Possible solution on error - warning: strtotime()

Just a tips if you get a warning: strtotime() first time you create a node (page)

this is a PHP problem
find php5.ini

I found 2:
/etc/php5/apache2/php5.ini
change as follows:
[Date]
; Defines the default timezone used by the date functions
; http://php.net/date.timezone
date.timezone = your timezone inside single quotes f.ex. 'Europe/Oslo'
save

/etc/php5/cli/php.ini
change as follows:
[Date]
; Defines the default timezone used by the date functions
; http://php.net/date.timezone
date.timezone = your timezone inside single quotes f.ex. 'Europe/Oslo'

restart apache

This should resolve the problem

Enjoy!