calculate day of week from date

@mike @sharjeel: please post the exact steps showing your work, so I can see where you might be making a mistake. It's the hump that requires crossing before making it to the end, which is Friday. 2. The Date Number is 20, because it's the 20th of July. Concepts. South - Dates should be entered by using the DATE function, or as results of other formulas or functions. Add the day of the month. So, if you're trying to calculate August 29, 2004, you can do it like this: 2004 was a leap year, but we're looking at August, so we don't have to modify the output. 2 mod7 = 2 Leap-Year-Code: -------0 A study in 2011 found that the average person moans for 34 minutes on Mondays, as compared to 22 minutes on other days. year code 0 I prepared such a book" named calendar for ever" from which u can find out any day of date within seconds since the gregorian calendar was instituted. I made a java program which does all the job like a charm please suggest me more similar techniques which i can convert into programs. Since we launched in 2006, our articles have been read more than 1 billion times. 93 +24 = 117 mod 7 = 5 = year code plz clear the concept of leap years, My Bad Within standard 100-year blocks (i.e. If the given year is 1642, then the Dozen-year is 1636, because of 1636-1600 12*3. We select and review products independently. Then, at the bottom, click OK.. The Year Code These should be easy to remember because it is 7,14,21,28, and we're doing math by 7s because there are 7 days per week. You could use a number shape image like a swan to hold that in memory while you calculate the items below. The Formula. Please assist. Take '66 and divide by 4, ignoring the remainder: 16. The "ddd" setting tells Excel to use the first three letters of the weekday name. By signing up you are agreeing to receive emails according to our privacy policy. Note: Month-Code: -------0 December 5. C= 20. Tap the knuckle of your index finger and say January. Tap the gap/dip/valley between the knuckles of your index and middle fingers and say February. You can remember that January has more days than February because your knuckle is taller than the gap. 4. If the date is in January or February of a leap year, subtract 1 from step 4. Time card calculator. Add 69 to 17 to get 86. Julian- after 18th century. As someone mentioned another algorithm using the month code list for 2018 ( 033614625035 ) , this is the same used in here for general calculation(s) for Julian and gregorian calendars. If you cant figure out why you keep getting a different answer than the Doomsday Calculator on any date B.C.E., such as number 2 from the practice quiz, dont forget to subtract one from the year before placing a negative sign in front of it to account for the fact that there is no year 0 in the Gregorian calendar. 300, 700, 1100, 1500,1900, etc. Add 66 to 16 to make 82. If youre given a date like 4/20/1642, which is not a Doomsday, then simply find the nearest Doomsday by repeatedly adding or subtracting 7 to known Doomsdays. A way to quickly memorize 033614625035 without a complex mnemonic system would be to use a number shape system to associate images with each month. Year Code: 6, Month = 0 Date+month code+century code+how many leap years complete in that year+year no )7, 6th March, 2004 is coming wrong plz reply February = ( Number of days in Jan + Remaining days in Jan ) / 7) = (31+0)/7 = 3, March = ( Number of days in Feb + Remaining days in Feb ) / 7) = (28+3)/7 = 3, April = ( Number of days in Mar + Remaining days in Mar ) / 7) = (31+3)/7 = 6. We can plug the numbers into the formula: @surendra - please attempt it first and show your work in a comment. 2 (Tuesday). (Not Jan or Feb January, March, May, July, August, October, and December have 31 days. @Senthil - did you take into account Julian Dates? If you count the date assuming 5 business days in a week (Monday to Friday) (by excluding Saturdays and Sundays), the outcome would be April 22, 2032, 2467 days from the date November 08, 2022. The Gregorian Calendar began on 14 September 1752, skipping 11 days. Since we must subtract 100 three times from -1700 to arrive at a Big Tuesday-year, the Century-day is THREESday. 26 mod 7=5 Thank you sir. To convert your dates to days of weeks without using a separate column, use Excels custom number format. Internet Says Friday, (4 days difference) We can calculate the Quad-day as follows. July 6 ), with the exception that years divisible by 100 are not leap years. When a Friday falls on the 13th day of a month, it is said to be bad luck. 1800s: 19 2200s: 19 2600s: 19 Try again and if it still doesn't work, post all the steps of your calculation in a comment here. Add the day of the month. = 27+ [(159-1)/5] +22+5.5+5-40 In Sweden, most children are only allowed to have candy on Saturdays. Some details about August 10, 2029: August 10 is Two Hundred Twenty-first day of the year. Suppose the year is not in the above table. Note that the top row of the chart does not fit the pattern. 200, 600, 1000, 1400, 1800, etc. The number of months to add to 'Date'. 5 mod 7 = 5 You only subtract 1 in a leap year if the date is in January or February. Week Number Calculator - Find the week number for any date. To calculate day-of-week for years farther away (say 1970 or 1900 or 1800) it might help to memorize key years and the base day of that year, rather than counting from 2007 / Wednesday back to 1800 (don't forget leap years). In conclusion, you can reduce away multiples of 7 during the calculations except from the YY div 4 there YY needs to be intact,but its result can be reduced. January has 31 days. For this example, we'll use the date "11/7/2012." In A1, enter that date. 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If the date were 6/20/1642, then you would subtract 7 days twice to discover that 6/20/1642 is the same day of the week as 6/6/1642, which is a known Doomsday. = 27+ [31.6] + 22 + 5.5 + 5 40 Putting the values in the formula, we get, F= 2+ [(13*1-1)/5] +04+04/4+20/4-2*20 08 / 4 = 02. The fraction, 2/4, is dropped. Let us take 19th November 2582 as an example. dese5 before performing the algorithm for completeness. That would link the month of October with the number zero. I looked on the computer and it said a Monday. C = 20. One of the most well-known Tuesdays is Black Tuesday, which was Tuesday, October 29th, 1929. To get to the Year-day of a year immediately preceding a normal year, subtract one from Year-day of the (larger) normal year. September-07, 1601 7. Year-Code: -------6 in another column, enter the formula. 5 - Friday. get day from date algo How do I get . This is used in the US after 1752 (after the British took it up) but in some countries, it was taken up earlier (Spain and Portugal). And if u want know day of 5/12/ 2016 that is on Monday and 5 /12/ 2017 on Tues day, and 5/12/2035 is on Wed day. Divide it by 4 and discard any remainder. Dozen-years and Quad-years are leap years (UNLESS they are also Century-years, excluding the cases in which they are also Big Tuesday-years when they ARE leap years). the 20th century) is Wednesday. While finding a day of the week we are only interested in the remainder when numbers are divided by 7. Do you have a date in your spreadsheet that you want to turn into the day of the week? (Year Code + Month Code + Century Code + Date Number Leap Year Code) mod 7. The month in our example is November, which has the key value of 4. In Great Britain, and what was to become the USA, the calendar system changed from the Julian Calendar to the Gregorian Calendar on 2 September 1752. 1. So, 14 march 1987 was on Saturday. This displays the day of week by its full or shortened name. could you explain the logic behind the formula and calculation. = 1+ [(26-1)/5]+83+20.75+4.75-38 The default value is Day.Sunday. Verify here: The Key Value method uses codes for different months and years to calculate the day of the week. 36 mod 7 Since 4/4/1642 4/-3/1642 3/28/1642, we know that 3/29/1642 FIVEday + 1 SIXAday. Also, if you still arent getting the same answer, make sure that you input the correct number for the month. No this is not a typo; 3/0 is simply another way of thinking about the last day of February. First, divide YY by 4 and discard the remainder: 97 div 4 = 24. There is no need to do that much calculation. (People in English-speaking countries used a different calendar before September 14, 1752. But it is a leap year if its divisible by 400. March (month 3) has 31 days, so 4/-3 3/28. After calculating F divide it by 7 and get the remainder. It also gives out a few facts as well as the calendar of the month. West - code 6 ( 2000s ). Thank you and all the viewers of this site for their clues. We know 4/4/1642 is a Doomsday, so we add 14 days to discover that 4/18/1642 is a Doomsday. This is also the day where most job applications are submitted. In Excels ribbon at the top, click the Home tab. If the given year is not divisible by 4, like 1642, then subtract the Quad-year from the given year. Month Offset Feel free to weigh in though! Note: Both the methods work only for the Gregorian calendar. = 5 mod 7 Concentrate on being precise first before you concentrate on speed. It would be easier if one is able to memorize the codes which are very easy to learn. Traditionally, it was believed that Saturdays were the only viable days to hunt vampires because that is when the monsters are in their coffins. Divide this value by 7 and take the remainder.129/7=18, remainder is 3. Steps: Take the last 2 digits of the year. 1 2 3 4 Second date: Enter the end date for the calculation. Date: More calculators: Time duration calculator. Thank u so much this really works, please posting updates! If you are looking at a Julian date, the formula is to take the century number and subtract it from 18 and then mod 7. He has been writing tech tutorials for over a decade now. century code 6 Month Code = 3 So, 1/11 and 2/1 would be the leap year Doomsdays. Weekday Calculator - What Day is this Date? Any way out? The Century-year is the first year of any given century. February 3 will give the correct answer. But I am not able get the answer in case of leap year..plz explain it in a simple way.. The Year-day of any given year is the day of the week on which all of its Doomsdays lie. For Einsteins birthday in 1897, the Century Code is 2, because its a Gregorian date, and the chart above shows that dates in the 1800s get an adjustment of 2. Wednesday is thus also the Year-day of 1640. 30 mod 7 = The world can even think of months as having negative days. If you subtracted 100 once, then the Century-day is Sunday; if twice, then its Friday; if thrice, then its Wednesday; if four or more times, then you messed up because one of every four Century-years is a Big Tuesday-year. I'm happy to help, but I would like to see an attempt first. So we again subtract 2182-400=1782.Now we look at the table for the 1700s, and get the code 4. The above equation is for Year up to 2017. It would be easier if one is able to memorize the codes which are very easy to learn. I'm happy to walk through examples if people show me their work first. And in the selected cell, you will see the day of the week for your date as a number. Putting the values in the formula, we get, F = 27+ [(13*12-1)/5] +22+22/4+20/4-2*20 The following example gets the date from the [HireDate] column, adds 1, and displays the weekday corresponding to that date. Monday can be alternatively known as "suicide day", due to the relatively higher number of suicides that take place on this weekday. Date code=28 May 1st Friday, Aug 1st Saturday and Mar 1st Sun day. The below mentioned methods are not specific to any technology and can be implemented in any programming language. This problem can be easily fixed by checking for a subtotal of 0 before subtracting the Leap Year Code. For example, 5/9, 5/16, and 5/23 are all Doomsdays. . Take the reminder. Use the DateTime.DayOfWeek or DateTimeOffset.DayOfWeek property to retrieve a DayOfWeek value that indicates the day of the week. (Year Code + Month Code + Century Code + Date Number Leap Year Code) mod 7, (4 + 6 + 4 + 16 - 0) mod 7 = To convert 8/-6 into a normal date, simply add the number of days in the 7th month (July). (16 + 4) % 7 Now divide the number by seven, and the remainder will tell you the day of the week, with zero being Sunday, one being Monday, two being Tuesday, three being Wednesday, four being Thursday, etc. Thus, June -64th is equivalent to March 28th, which is a Doomsday. 6 - Saturday. but it was tuesday.. To use this algorithm for other years, increase your day by one for each year (2006 is Tuesday, 2005 is Monday). Please try and find a solution to the leap year errors. 0, The remainder will be the last digit and quotient will be zero (eg- 2002 7 = q = 0 and r = 2). Day should be Sunday. If you know that 10/10/-2543 is a SIXAday, then you can quickly determine that 10/2/-2543 is a FIVEday, because of 2-10 -8 -8+7 -1, and 6+(-1) 5. This is why Sunday is both 0 and 7. Some countries in the Middle East start the work week on a Sunday. (If I count 4 days forward then it's the right answer every time) For example, 6/6 and 6/-64 are Doomsdays. If youd prefer a shortened day name, like Mon for Monday, remove one d from the function argument as follows: And you now have the shortened day name in your selected cell. from my book to find out the day of any date need not to do any calculation. However, the correct answer is Monday. The number of weeks to add to 'Date'. Then I can help with any errors. Hours calculator with lunch. Sunday is recognized as the day of rest and worship by the Christian religion. Subtracting 1 for the leap year could give you an unwanted negative value. = 27+ [158/5] +22+5.5+5-40 Then right click and choose Format Cells from the context menu, see screenshot: 3. In the spreadsheet, make sure you have at least one date. If you are having trouble associating the images with the months, pick an aspect of each month to associate the image with. Month code : 5 Quite a nice trickI am my own calendar now..Im now a walking calendar. Watch out for leap years. Century offset calculation (Gregorian Calendar): Step1 :Take the first two digit of the given year. The Key Value method uses codes for different months and years to calculate the day of the week. The WEEKDAY function syntax has the following arguments: Serial_number Required. To do so, first, open your spreadsheet with Microsoft Excel. Month code 109/7=15, remainder 4=Thursday. Start with the number from this list of centuries: That is the Year Code for 1897. The Century Code for dates in the 2000s is 6. It is usually a day of retail insanity due to the markdown of retail items. For instance, it seems that 20 percent of the people know the day of the week they were born on, so there will often be someone around to check out if you are correct. The day of the week is Monday. When we divide by 7 we have to find the greatest multiple of 7 less than -15, so the remainder will be positive (or zero). It allows you to take a date, like 14 March 1987, and mentally calculate which day of the week it fell on. For example, 3/29/1642 is closer to 4/4/1642 than to 3/0/1642. If you do that, then I can help walk through it. @Aruna: Please post the calculation that you have attempted, and we could take a look to see where there might be a mistake. Note though, that the Century-year of the century that -1362 lies in (i.e. Finally, Click on ' OK '. In the previous table, we see that the date calculated for the first week is often in December.In fact, the formula returns the month of January only if January 1 is a Monday.. Now, if we consider the year 2021, we can see that 01/01/2021 is a Friday.And so, the calculated Monday will be 28/12/2020. astronomical year numbering) to get 1/16/-6,387,227. Ex, Dec 28th 1974 : Putting the values in the formula, we get, Join 425,000 subscribers and get a daily digest of news, geek trivia, and our feature articles. You could picture a butterfly in February and March, if you use a butterfly image for the number three. Discard all the decimal values and then find the final value of F. After getting the value of F, divide it by 7.The value of F can be either positive or negative. If so, Microsoft Excel has multiple features and functions to help you do that. Add the day of the month to the value obtained in step 2. In our case, this is 82. Pick a Sunday date from sometime in the past (which one you choose will depend on the date ranges you're validating). This is calculated with Excels WEEKDAY function. C.E. means Common Era and is equivalent to A.D. B.C.E. means Before the Common Era and is equivalent to B.C. For more information refer to the Wikipedia article entitled Common Era: In this guide, the formats mm/dd and mm/dd/yy will be used to represent dates in a compact form. = 2+ [12/5] +10-40 Follow that up by hitting 'Calculate Weeks Difference'. = (04 + (1)) mod 7 Don't give up, though. You will get discouraged at first when you're not having much luck progressing. Day code 28 mod 7 = 0 Time and Date Duration - Calculate duration, with both date and time included; Birthday Calculator - Find when you are 1 billion seconds old; Weekday Calculator - What Day is this Date? For 121 mod 7, start removing sevens: Weve removed all the sevens from 121 until we are left with a remainder of 2. but when the year is leap year as well as century?? In the selected cell, type the following WEEKDAY function and press Enter. Example: July 4, 1776 (7-4-1776): Add the last two digits of the year to the value we obtained in the previous step i.e. Days calculator. You can also work backward from Dozen-years and Quad-years. (0+2+6+28-0) mod 7 Calculate the abbreviated weekday name. int total = centCode + yearCode + monthCode + day - leapYearCode; soumanmanda: this is ur mistake.for leap year its true, that u minus 1 in the end from the total If you can divide a Julian year by 4, its a leap year. 93 div 4 = 24 This method works. This algorithm works for the Gregorian Calendar. Therefore - (6+10+6+14-1)=35, 35Mod7=0, 0=Sunday If you change that number, you won't get the same answer -- or are you asking something different? I have another idea to remember month code. Once again thanks to all. (Important note: this does not mean that April 4, 2001, was also Tuesday. is a Tuesday. it is more easy than to find out a word's meanig from the dictionery. For example, August 16, 1783 B.C.E. Number-days are numbers that are associated with days of the week by a mnemonic. And thats how you know what day it was on a specific date in Microsoft Excel. June 4 DOB 28/12/1976 Then I did 18-2=16 mod 7 which was 2. There are 54 days remaining until the end of the year. Calculate day of week from date - Javascript Author: Yvonne Maslow Date: 2022-06-05 Let us consider the first case in which we do not have leap years, hence total number of days in each year is 365.January has 31 days i.e 7*4+3 days so the day on 1st feb will always be 3 days ahead of the day on 1st January. Equation Also known as Hump Day in the U.S. because of its place in the middle of the workweek. Monday could be thought of as -6, 8, 71, etc. Take the last 2 digits of the year. The programming algorithm is provided below: int yearCount = year - ((year / 100) * 100); Year code : ((74 div 4) + 74) mod 7 = ( 4 + 4 ) mod 7 = 1 {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/0\/01\/Calculate-the-Day-of-the-Week-Step-1.jpg\/v4-460px-Calculate-the-Day-of-the-Week-Step-1.jpg","bigUrl":"\/images\/thumb\/0\/01\/Calculate-the-Day-of-the-Week-Step-1.jpg\/aid47853-v4-728px-Calculate-the-Day-of-the-Week-Step-1.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"