This timer formatting code doesn't feel optimized to me. Am I missing something?

Projects Programming
6

Optimized as follows: Didn't realize I was trying things that wouldn't work because of limited functionality.

void elapsedTimer() {

int m,s;
unsigned long getTime = millis();

char time_str[7] = "";   
 
  m= getTime/60000;
  getTime=getTime%60000;
  s= getTime/1000;
  
  sprintf(time_str, "%02i:%02i",m,s);  

  display.setTextColor(WHITE, BLACK);
  display.setTextSize(1);
  display.setCursor(0,57);
  display.write(time_str);
}

This timer will never need to run more than 15 min.
My next task will be to try to start this timer on a variable state change, and have it count from that point up, not from the time the sketch started. That should be easy enough I hope..