Monthly Calendar & Holiday is a free, easy-to-use calendar app for Android developed by 16nine. It is designed to help users keep track of their schedule, mark important dates with emojis or circles, and write notes on the calendar. The app also allows users to schedule reminders for upcoming holidays.

One of the standout features of the app is its big, zoom-able month calendar. The app also has a small size and opens quickly, making it a convenient choice for users looking for a fast and efficient way to manage their schedule. In addition, the app allows users to add school holidays in the settings and download country holidays for over 100 countries, including Singapore, Nigeria, India, and the United States.

For users interested in optional calendars, the app also offers a Hijri calendar for Islamic months and a Lunar calendar for Chinese months. It is important to note that the app requires internet data to update its data source, ads content, server configuration, and report errors. Overall, Monthly Calendar & Holiday is a valuable tool for anyone looking for a comprehensive and user-friendly calendar app.