NOVAL ADIB. The Impact of Turn-Of-The-Year Effect and Month of Ramadan Effect on Abnormal Return During The Covid-19 Pandemic Era: A Comparison of Two Event Studies of Calendar Anomalies in The Indonesian Stock Market. AZKA International Journal of Zakat & Social Finance, [S. l.], v. 5, n. 1, p. 113–122, 2024. DOI: 10.51377/azjaf.vol5no1.184. Disponível em: https://azjaf.zakat.com.my/index.php/azjaf/article/view/184. Acesso em: 30 mar. 2026.