= Calendar algorithms
{wiki=Category:Calendar_algorithms}
Calendar algorithms are computational methods used to determine the day of the week for any given date or to perform date-related calculations. These algorithms simplify the process of calculating dates, especially when working with historical dates or performing calendar arithmetic. Some well-known calendar algorithms are: 1. **Zeller's Congruence**: This is a popular formula for calculating the day of the week for any date in the Gregorian or Julian calendar.
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