You are correct my friend. The Islamic calendar is different. 

Islamic Date Today
21 Jun, 2024 - Worldwide Islamic date today is 15 Dhul-Hijjah 1445 in Arab countries and other parts of the world. South Asian countries, including Pakistan, India, and Bangladesh, observe the Islamic date as 14 Dhul-Hijjah 1445. The Islamic date, also known as Hijri or Arabic date, follows a lunar calendar with 12 months of 29 or 30 days, totaling 354 or 356 days in a year.