Madrid is 4 hours behind Islamabad
Best overlap: 12:00 PM to 6:00 PM in Islamabad is 8:00 AM to 2:00 PM in Madrid.
For the smoothest call, aim inside 12:00 PM to 6:00 PM in Islamabad, i.e. 8:00 AM to 2:00 PM in Madrid. This is one of the easier pairings: 6 hours of shared time means flexible, low-stress scheduling. Seasonal note: Madrid uses daylight saving and Islamabad doesn't, so double-check the times in your own months — they can move by an hour.