Going back to January 2 (Monday), think about what you want to display. These values can be used to correct the days and display the appropriate week number. You will notice that it resets back to 0 for the next Monday, January 9. While January 8 (Sunday) returns a 6, since you are 6 days away from Monday. This implies that you are 1 day away from Monday. On January 3, which is a Tuesday, the count returns a 1. Use return_type=3 where Monday is 0 and Sunday is 6.To start, let’s take Januas an example and adjust accordingly.įirst, get the weekday associated with this date.
Week number formula excel how to#
Once you have the same number for all the dates in that week, you can then figure out how to switch that to count from weeks 1 through 5 for any given month. January 31 falls on a Tuesday, February 1 on a Wednesday), you can find the date of last Monday and give all the succeeding weekdays the same week number. This is especially helpful so that in instances where the week is split between two months (e.g. There is a formula that gives the date of the previous Monday. IF(WEEKDAY(DATE(YEAR(B5),MONTH(B5),1)=7, WEEKNUM(DATE(YEAR(B5),MONTH(B5),1)), WEEKNUM(DATE(YEAR(B5),MONTH(B5), 1)) + 1))Īpply the formula for all the rows and it should now display the correct week numbers. This will tell the formula not to add 1 if the 1 st of the month falls on a Saturday (7). So you should tweak the formula to handle this instance by using another IF() statement. However, our cutoff period is a Monday, not a Sunday. This is happening because for the instances where the 1 st of the month falls on a Saturday, the formula counts it as part of the 1 st week. When you inspect the data, you will notice that when the 1 st of the month falls on a weekend, the first weekday of that month starts as week #2 and skips week #1: The week number is now blank when the date falls on a weekend. We can then use an IF() statement to check if the value returned is bigger than 5 (Friday).Īfter integrating the IF() statement, the formula now becomes: Cell C5 = IF(WEEKDAY(B5,2)>5,””, WEEKNUM(B5)-WEEKNUM(DATE(YEAR(B5),MONTH(B5), 1)) + 1)
In this case, for simplification, use 2 – Numbers 1 (Monday) through 7 (Sunday), which will return the number 6 and 7 for weekends. return_type – tells what number to return for specific days.īy default it uses 1 – Numbers 1 (Sunday) through 7 (Saturday).serial_number – the date you are checking, B5.The syntax of the WEEKDAY() function is: = WEEKDAY(serial_number, return_type]
Use a combination of the IF() and WEEKDAY() functions here. Now all that’s left to do is to not display anything when a date falls on a weekend. Cell C5 = WEEKNUM(B5)-WEEKNUM(DATE(YEAR(B5),MONTH(B5), 1)) + 1Īpply the formula down to the last row and now you have the correct week number for February 1. You will again notice that the week now starts counting at 0.Īdd a 1 to the formula to address this.
Week number formula excel serial number#
The number 1 is used since we want to find the serial number of the 1 st day of that month so that we can eventually find its corresponding week number. We will be using a combination of the DATE() function to find the serial number of the 1 st of a specific date, and the YEAR() MONTH() functions to find what year and month it should use. Subtract the current week number with the week number of the 1 st of the month and increment it as it goes. Whenever a new month is started, the week counter should reset back to 1. To understand how to fix this, we will go through it step by step. In this example, we want February 1 to be counted as week 1 of February instead of week 5 of January. However, this does not count the 1 st of the month as a new week when it doesn’t fall on a Monday. You will notice that the values rum from week 1 to 53 and then resets to week 1 when it starts a new year. The formula for cell C5 now becomes: Cell C5 = WEEKNUM(B5)ĭrag the formula down to the last row (or double click on the lower right corner of the cell). You will have an option to pick any way of the week. serial_number – this is the date you want to convert.Its syntax is: = WEEKNUM(serial_number, )
Excel’s WEEKNUM() function is used for Case 1.
0 kommentar(er)
