Calendar, Islamic Astronomy 11 Islam 9 Religious aspects 5 Islamic countries 4 Moon 4 Observations 4 Ramadan 4 Rejab (Islamic month) 4 Syaaban (Islamic month) 4 Calendar, Chinese 3 Calendar, Hindu 2 Customs and practices 2 Encyclopedias 2 Fasts and feasts 2 Islamic calendar 2 Islamic law 2 Religious 2 Religious life 2 Calendar 1 Congresses 1 History 1 Islam and astronautics 1