i probably messed up the calculation a bit.
here is a working code
#include <Time.h>
unsigned long theDateWeGotTogether = 1194282000 ; //in unixtime
unsigned long days ;
void setup() {
Serial.begin(9600);
adjustTime(1297615685); //used to try the code without knowing the right time. just paste in the unixtime you know
}
void loop()
{
days = ((now() - theDateWeGotTogether) / 86400); //magic nubmer 86400 is the number of seconds in a day
Serial.println(days);
delay(3000);
}