The lunisolar calendar used in the Bengal region marks dates and festivals according to both solar and lunar cycles. A typical version covers the period from mid-April of one Gregorian year to mid-April of the next, encompassing the Bengali year (e.g., 1431 to 1432). Such calendars often list significant cultural and religious observances, including Pohela Boishakh (Bengali New Year), Durga Puja, and Kali Puja. They may also provide corresponding Gregorian dates for ease of reference.
This time-reckoning system is integral to Bengali cultural identity and social organization. It dictates the timing of agricultural practices, festivals, and various personal and community events. Historical records suggest the Bengali calendar has evolved over centuries, influenced by astronomical observations and regional customs. Maintaining an accurate calendar is vital for preserving cultural heritage and ensuring the smooth functioning of socio-religious activities within the Bengali community.