Islamic Calendar 2021 is an app developed by Smart Calendar World that provides a comprehensive Islamic calendar based on lunar Hijri calculations by Umm Al-Qura of Saudi Arabia. The app also displays Gregorian dates alongside the Islamic calendar. It is a useful tool for the Muslim and Islamic community worldwide, providing a calendar and reminder for all Wiladats and Shahadat dates. The app is especially helpful for those who want to stay connected to God and Ahlulbayt in their day-to-day business.

The app is very lightweight and easy to use. Users can easily swipe and change the month with an attractive user interface design. The Islamic Calendar 2021 app provides a full detailed calendar for Ramzan, Eid, Ramadan, Prayer Time, and other festivals important for the Oriya people as well as important Indian festivals. The app also displays Arabic Calendar, giving a comprehensive detail of each day and its significance in the Arabic dates during the Arabic months. Additionally, the app provides complete information about all Islamic festivals and holidays. Islamic Calendar 2021 is a totally offline calendar, allowing users to read and see it without an internet connection.