how to calculate any day of any year

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Algorithm: Calculate the day of the week on the first day of a year.

First, use your formula to compile a simple program: Main () {Int year;/* year */ Intw;/* day of the week */ Scanf ("% d", & year ); W = (year-1) + (year-1)/4-(year-1)/100 + (year-1)/400 + 1) % 7; Printf ("% d \ n", W ); Getch (); } Enter 1 during

Calendar query algorithm How to calculate how many days a day is the basis of knowledge

How do I calculate the day of the week? --Caille (Zeller) formulaWhat is the day of the week in history? What day of the week is the future? There are a number of computational formulae (two general calculation formulae and some piecewise

Determine the day of the week by date (using Kimlarsson to calculate the formula)

Kimlarsson calculation formula determines the day of the week by the date calculateweekday (int y, int m,int d) { if (m==1| | m==2) m+=12,y--; int iweek = (d+2*m+3* (m+1)/5+y+y/4-y/100+y/400)%7; Switch (iweek) {case 0:printf ("Monday \ n");

Linux command Detailed date usage (Calculate Mother's Day and father's holiday script sample) _linux

Common parametersFormat: DateDisplays the current date time.Format: Date mmddhhmm # In short, it's the day of the month.Format: Date mmddhhmmyyyyFormat: Date MMDDHHMM.SSFormat: Date MMDDHHMMYYYY.SSSet the current date time, only the root user can

T-SQL 2 tips:1. Calculate any two dates between " Monday " to " Sunday " each have a few! 2. According to birth.

These two tips, do not write do not know, a write scare! Are seemingly simple, actually do up on the Meng, have to think carefully, can write right! All have the date operation of the program should be careful Oh! Let's say the second one: 2.

Calculate the number of working days between any two dates in Java

Main ideas: For any 2 dates, such as: Date_start=2006-10-1, date_end=2006-10-14, first calculate the interval between the dates (days), and then get their next Monday date for Date_start and Date_end respectively. So you can get a new full date

Year, month, and day-Regular Expression

PS: After learning Regular Expressions for so long, I didn't make any decent patterns. I woke up early and came up with a whimsy, I made up my mind to prove that my regular expression is not white-so I chose the most common date match ......  

C language-Enter the year, month, and day to figure out the day of the year

/*note:your Choice is C IDE*/#include"stdio.h"voidMain () {intY,m,d;//year, month, day intcr,ds=0I//CR: The variable that determines whether it is a leap year, is 1, no 0;ds: The sum of the days; I is a loop variable Charrun[ A] = { to, in, to,

Spring Festival will come, and to the performance of the year-end award of the time! Programmer Performance KPI How do you calculate this long history puzzle?

The performance of programmers , like a long history puzzle, has long plagued a large number of programmers and their leaders.KPI (key performance indicators KPIs) is an enterprise's favorite performance appraisal tool, but KPIs usually only have a

Calculate the current date is the week ordinal of this year

First, you need to understand an international standard: ISO8601, which is the International Organization for Standardization (ISO) notation for defining dates and times, which is the representation of data storage and interchange, information

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