calendar

/ˈkæləndər/

a system of timekeeping that defines the beginning and length and divisions of the year

中文释义：日历；历法

The Gregorian calendar is the most widely used civil calendar in the world.

公历是世界上使用最广泛的民用历法。

She marked the deadline on her calendar to avoid missing the submission date.

她在日历上标出了截止日期，以免错过提交时间。