Wa'alaikumsalam! Honestly sama je, 28 weeks or 28 weeks 1 day, most mummies and doctors count it as starting dari 28 weeks onwards, so don't stress about the exact timing lah. A few of my mum friends were also confused about this during their first pregnancy, tapi the main thing is just to start tracking baby movements consistently once you reach that point, jangan overthink the exact hour! If you're worried or unsure, best to ask your doctor or midwife at your next check-up, they'll clarify it based on your specific due date