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The basic approach of nearly all of the methods to calculate the day of the week begins by starting from an "anchor date": a known pair (such as 1 January 1800 as a Wednesday), determining the number of days between the known day and the day that you are trying to determine, and using arithmetic modulo 7 to find a new numerical day of the week.
A stopwatch that allows the stopwatch time to be multiplied or divided by a constant, and continuously display the results. This is referred to as a "Dynamic Rate Calculation." It can also display the day of the week for any date from 1900 to 2099. The HP-01 is Hewlett-Packard's first algebraic calculator.
To find which day of the week Christmas Day of 2021 is, proceed as follows: in the year 2021, doomsday is on Sunday. Since December 12 is a doomsday, December 25, being thirteen days afterwards (two weeks less a day), fell on a Saturday. Christmas Day is always the day of the week before doomsday.
Star Wars grossed $4,538,323 nationally for the 4-day Columbus Day weekend [57] [58] 42: October 19, 1977: $1,227,260 [59] 43: October 26, 1977: Looking For Mr Goodbar: $1,293,400: Star Wars placed second on the chart based on 104 theaters but grossed $2,891,000 nationally in the weekend ended October 23 compared to $1,540,635 for Looking For ...
October 27 is the 300th day of the year (301st in leap years) ... 1977 – Jiří Jarošík, Czech footballer; 1977 – Sheeri Rappaport, American actress [20]
The day of the week can be easily calculated given a date's Julian day number (JD, i.e. the integer value at noon UT): Adding one to the remainder after dividing the Julian day number by seven (JD modulo 7 + 1) yields that date's ISO 8601 day of the week. For example, the Julian day number of 22 February 2025 is 2460729.
In the U.S., Veterans Day was observed on the fourth Monday in October for the last time after having been moved to that date since 1971 by the Uniform Monday Holiday Act of 1968. The holiday was returned to November 11, the anniversary of the Armistice Day end of World War One, where it had been observed nationally from 1938 to 1970, with the ...
1977 was a common year starting on Saturday of the Gregorian calendar, the 1977th year of the Common Era (CE) and Anno Domini (AD) designations, the 977th year of the 2nd millennium, the 77th year of the 20th century, and the 8th year of the 1970s decade.