All you need to do is to be aware of which day is the first day of the year. You can adjust your WEEKNUM formula based on above instruction to get correct results. Here is how it works: First day of he year If you choose to use system 2 return types, you need to input retun type as 21 instead of 2. System 2 considers the week containing first Thursay of the year as first week of the year.If you choose to use system 1 return types, you need to input retun type as 11 instead of 1 or 12 istead of 2. System 1 considers the week containin 1st of January as first week of the year.But there is more to know about return type. We usually use WEEKNUM Function with return type as 1 or 2 based on our calendar system. Your valuable feedback keeps us motivated to create tutorials like this.ĭon’t forget to check our website for various Excel-related problems and solutions.Syntax for WEEKNUM Functions is as below: On applying the WEEKNUM Excel function, it will return 28. For example, suppose cell A1 has July 8, 2021, which falls on Thursday. ![]() ![]() If the return type is not provided, Sunday is considered one by default. Also, feel free to give feedback in the comment section. The method to use this WEEKNUM function is as follows: WEEKNUM (serialnumber, returntype). Download the practice workbook and try these yourself. We recommend you learn and apply all these instructions to your dataset. To conclude, I hope this tutorial has provided you with a piece of useful knowledge on how to convert the week number to a date in Excel. ✎ In ISO week date system, the week begins with Monday, and the week including the first Thursday of the year is assumed week 1. So, change the format to Dates from the Excel ribbon. ✎ The formula basically returns the dates in serial number format. Read More: How to Convert Text to Date in Excel (10 ways) It makes the output grammatically correct. The same applies to days, if you have 1 day, it will add “day”. If you have one week, it will add “week” after the 1. We added the IF function to handle the “week” or “weeks” issue. INT(C5/7): It returns the number of weeks.Ĭ5-INT(C5/7)*7: It returns the number of days that are not sufficient for the weeks (less than 7 days). To get the start dates, type the following formula in Cell E5 and drag the fill handle icon down: You can wrap the Excel formula in the MAX function and the MIN function to always start counting from January 1. Now, your week 1 starts with January 1 and the weekday is Monday. Automatically, the end date formula consistently returns December 31 as the end date of the last week in the year, regardless of the day of the week.Ģ.1 Always Counting Mon-Sun Week (Starts from Jan 1) The start date formula always returns January 1 as the start date of week 1. We saw in the previous formulas, they return Monday or Sunday of week 1 even if it falls within the same year that you give or the earlier year. To convert the week number to date in Excel, you can use the MIN function and the MAX function with the same formula. MAX and MIN Functions to Convert Week Number to Date
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