A calendar is a system of organizing days for social, religious, commercial, or administrative purposes. The term “calendar” can also refer to a physical representation of such a system, such as a wall calendar or a digital calendar on a computer. Calendars are used to keep track of time and to schedule events. They can be based on astronomical events, such as the movement of the sun or moon, or on human-defined events, such as the start of a new year or the beginning of a new week.
The calendar for December 2025 is a standard Gregorian calendar. It has 31 days, with the first day of the month falling on a Monday and the last day of the month falling on a Tuesday. There are no major holidays in December 2025, but there are several minor holidays, including Hanukkah, which begins on the evening of December 10, 2025, and ends on the evening of December 18, 2025.
