Mool Nanakshahi Calendar App is an iPhone application that provides a comprehensive and accurate Sikh calendar. Developed by Irwin Singh, this app is available for free and falls under the category of Education & Reference.

The Mool Nanakshahi Calendar recognizes the adoption event of 1999 CE in Sikh history when the Shiromani Gurdwara Parbandhak Committee (SGPC) released the first calendar with permanently fixed dates in the Tropical Calendar. Unlike other calendars, the calculations in this calendar do not regress back from 1999 CE into the Bikrami era. It accurately fixes historical dates for all time in the future, making it a reliable tool for Sikhs around the world. The calendar goes up to the year 9999 CE, ensuring long-term usability and relevance.

With its user-friendly interface and accurate calculations, the Mool Nanakshahi Calendar App is a valuable resource for anyone who follows the Sikh faith or is interested in Sikh history and traditions.