Ключевые слова: activity, background, calendar, calendar year, celebration, clock, community, concept, conceptual, culture, dates, dzulhijjah, dzulkahdah, event, faith, fasting, graph, guide, highlighted, hijri, important, islamic, list, lunar, marking, month, months, notation, observance, organized, paper, planning, practice, purpose, ramadhan, religion, religious, reminder, schedule, seasonal, sequence, spirituality, structure, syaban, syawal, symbol, time, timeline, tradition, year,