Jak vypočítat Day of the Week
Co je Day of the Week?
A day-of-week calculator determines what day of the week any given date falls on. The Doomsday algorithm (Conway) or modular arithmetic can compute this for any date in the Gregorian calendar.
Průvodce krok za krokem
- 1Use the formula: (d + m + y + y/4 − y/100 + y/400 + c) mod 7
- 2d=day, m=month code, y=year, c=century adjustment
- 3Or simply count forward/backward from a known reference date
- 4JavaScript: new Date("YYYY-MM-DD").getDay() → 0=Sunday, 6=Saturday
Worked Examples
Vstup
July 4, 1776
Výsledek
Thursday
US Independence Day
Vstup
January 1, 2000
Výsledek
Saturday
Y2K millennium
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