Islamabad is 2 hours ahead of Moscow
Best overlap: 8:00 AM to 4:00 PM in Moscow is 10:00 AM to 6:00 PM in Islamabad.
8:00 AM to 4:00 PM in Moscow is when Islamabad is also working, at 10:00 AM to 6:00 PM their time. Islamabad is 2 hours ahead of Moscow, and with 8 hours of overlap you can even run back-to-back calls without stepping outside business hours.