The statement that "Islam won't last more than 1500 years" is a subjective claim with no basis in reality or Islamic teachings.
Religious beliefs and prophecies are matters of faith and interpretation, and their understanding can vary widely among different religious scholars and communities. Islamic teachings do include prophecies about the future, but the interpretation and timing of these prophecies are often debated.
The Islamic calendar (also known as the Hijri calendar) is a lunar calendar that began in the year 622 CE, marking the migration of Prophet Muhammad (peace be upon him) from Mecca to Medina, known as the Hijra. As of your mentioned year, 1444 in the Islamic calendar, it corresponds to approximately 2022-2023 in the Gregorian calendar.
It's crucial to remember that attempts to predict the end of the world or the duration of a religion are speculative and not endorsed by mainstream Islamic teachings. Islam, like other major religions, has endured for centuries and continues to be followed by over a billion people worldwide. Its longevity and future cannot be accurately determined based on arbitrary calculations or assumptions.
It's always essential to approach religious and prophetic discussions with respect, sensitivity, and a recognition of the diversity of beliefs within any faith tradition. If you have questions about Islam or any other religion, it's best to consult authoritative sources or speak with knowledgeable scholars or practitioners.