Cách sử dụng
A calendar is a tool that helps you keep track of dates and organize your schedule. It usually shows the days, weeks, and months of the year. You can use a calendar to remember important events, appointments, and deadlines. Some calendars are physical objects that you can hang on the wall or keep in your pocket, while others are digital and can be accessed on your phone or computer. It's important to use a calendar to avoid forgetting important dates and to manage your time effectively.