WEEKDAY Function

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What will we Learn from This Blog?

We will Learn About WEEKDAY Function in Excel and able to answer “how to use WEEKDAY function in excel” The syntex, How to Use it, Common Mistake Around it, Advance Tips and Tricks etc. Hope so we will end the blog and Know about this Logical Function Thoroughly. 

Introduction

Importance of Functions in Excel

Excel is a Day to Day Go through software now in this world, to calculate, get track of previous data. Functions are playing a crucial role in Excel as they enhance the efficiency and accuracy of data analysis and manipulation. from Automating Calculations, Dynamic Updates, Error Checking To data analysis it makes our life easy. 

Importance of WEEKDAY Function in Excel

The WEEKDAY function in Excel is important for analyzing and organizing date data. It returns the day of the week corresponding to a given date, represented as a number from 1 (Sunday) to 7 (Saturday). This function is commonly used in various scenarios, such as:

  • Organizing and categorizing data based on weekdays.
  • Calculating workdays or weekends.
  • Creating dynamic schedules or calendars.
  • Analyzing trends or patterns based on specific days of the week.
  • Automating tasks related to scheduling or reporting.
  • Facilitating conditional formatting based on weekdays.

What is the WEEKDAY Function?

Defination

The WEEKDAY function in Excel is a built-in function that returns an integer representing the day of the week for a given date. The returned value ranges from 1 to 7, where 1 represents Sunday, 2 represents Monday, and so on, up to 7, which represents Saturday.

Purpose

The purpose of using the WEEKDAY function in Excel is to determine the day of the week corresponding to a given date. This function is commonly utilized for organizing data, analyzing trends, calculating workdays or weekends, creating schedules, and automating tasks based on specific days of the week.

Syntex for Excel WEEKDAY Function:

Syntex

The syntax for the WEEKDAY function in Excel is:


= WEEKDAY(serial_number, [return_type])


serial_number: The date for which you want to determine the weekday.
[return_type]: Optional. An integer that specifies the type of return value:
1 (default): Returns numbers from 1 (Sunday) to 7 (Saturday).
2: Returns numbers from 1 (Monday) to 7 (Sunday).
3: Returns numbers from 0 (Monday) to 6 (Sunday).

Return Value

The return value of the WEEKDAY function in Excel is an integer representing the day of the week corresponding to the provided date. This value ranges from 1 to 7, where 1 represents Sunday, 2 represents Monday, and so on, up to 7, which represents Saturday.

How to Use:

To use the WEEKDAY function in Excel:

  1. Select the cell where you want the result to appear.
  2. Type =WEEKDAY( in the formula bar.
  3. Enter the date or reference to the cell containing the date as the serial_number.
  4. Optionally, specify the [return_type] if you want a different numbering system for days of the week.
  5. Close the parentheses ) and press Enter.

    For example:
  • To find the weekday of the date in cell A1, you would use: =WEEKDAY(A1).
  • To specify a different numbering system, you would use: =WEEKDAY(A1, 2) for Monday as 1 and Sunday as 7.

Examples with Description

lets learn this Function with Example: 

Example 01: Determining Weekday for a Date:

=WEEKDAY(A2)

Suppose you have a list of dates in column A (e.g., “2024-03-15”, “2024-03-16”), and you want to determine the weekday for each date. You can use the WEEKDAY function to accomplish this. This function will return a number representing the day of the week, ranging from 1 (Sunday) to 7 (Saturday).

Example 02: Highlighting Weekends in a Schedule:

=IF(OR(WEEKDAY(A2) = 1, WEEKDAY(A2) = 7), “Weekend”, “Weekday”)

Suppose you have a list of dates in column A representing a schedule, and you want to highlight weekends for better visualization. You can use the WEEKDAY function within an IF function to check if a date falls on a Saturday or Sunday (day 1 or day 7). If it does, the formula returns “Weekend”; otherwise, it returns “Weekday”.

Example 03: Calculating Number of Workdays in a Month:

=SUMPRODUCT(–(WEEKDAY(DATE(2024,3,ROW(INDIRECT(“1:”&DAY(EOMONTH(A2,0)))),1))<6))

Suppose you have a date representing the start of a month in cell A2 (e.g., “2024-03-01”), and you want to calculate the number of workdays (Monday to Friday) in that month. You can use the WEEKDAY function along with other functions like DATE, EOMONTH, ROW, and SUMPRODUCT to achieve this. This formula generates an array of dates for the entire month, evaluates each day’s weekday, and counts the weekdays (Monday to Friday) using the SUMPRODUCT function.

Common Mistakes

Common Error

Incorrect return_type value: The WEEKDAY function accepts an optional argument [return_type] to specify the numbering system for days of the week. If an invalid or omitted [return_type] is provided, it may result in unexpected output.


Incorrect date format: If the date provided to the WEEKDAY function is not in a recognized Excel date format, it may lead to errors or unexpected results.


Inconsistent cell reference or range: If the cell reference or range provided to the WEEKDAY function is inconsistent or incorrect, it can result in errors or incorrect calculations.

 

Using non-numeric values as input: The WEEKDAY function expects numeric input representing dates. Providing non-numeric values, such as text or empty cells, will result in errors.

How to solve

Incorrect return_type value:  Ensure that the [return_type] argument is either 1, 2, or 3 according to the desired numbering system. If omitted, the default value is 1, which returns numbers from 1 (Sunday) to 7 (Saturday). Use 2 to return numbers from 1 (Monday) to 7 (Sunday), or 3 to return numbers from 0 (Monday) to 6 (Sunday).

 

Incorrect date format: Ensure that the date provided to the WEEKDAY function is in a recognized Excel date format. Common date formats include “yyyy-mm-dd” or “dd/mm/yyyy”. You may need to use the DATE function or convert text to date format using functions like DATEVALUE or TEXT.

 

Inconsistent cell reference or range: Double-check the cell references or ranges provided to the WEEKDAY function to ensure they are correct and consistent. Verify that the reference points to the intended cell or range containing the date data.

 

Using non-numeric values as input: Ensure that the input provided to the WEEKDAY function is numeric and represents valid dates. Convert any text representations of dates to numeric values using functions like DATEVALUE or TEXT, if necessary.

How to Avoid

Incorrect return_type value: Double-check the syntax and provide the correct [return_type] argument when using the WEEKDAY function. Make sure it aligns with the desired numbering system for the days of the week.


Incorrect date format: Format dates consistently and verify that they are recognized as valid dates by Excel before using them in the WEEKDAY function. If dates are imported from external sources, ensure they are formatted correctly to avoid errors.


Inconsistent cell reference or range: Review and verify all cell references or ranges used in the WEEKDAY function before applying it. Avoid manual entry errors by using Excel’s autofill feature or selecting cells directly when entering formulas.


Using non-numeric values as input: Verify that the input data provided to the WEEKDAY function is numeric and represents valid dates. Use data validation techniques to restrict input to valid date formats if necessary.

Advance tips and Tricks:

Here are some advanced tips and tricks for effectively using this function in Excel:

Calculating Custom Weekday Labels:

Tip: Use the WEEKDAY function along with nested IF statements to assign custom labels to weekdays.

=IF(WEEKDAY(date) = 1, “Sunday”, IF(WEEKDAY(date) = 2, “Monday”, …))

By nesting IF statements within the WEEKDAY function, you can assign custom labels to each weekday based on their numerical representation. This technique allows for personalized labeling of weekdays in your data analysis.

Counting Weekdays within a Date Range:

Tip: Utilize the WEEKDAY function within a COUNTIFS formula to count the occurrences of weekdays within a specified date range.

=COUNTIFS(date_range,”>=”&start_date, date_range,”<=”&end_date, WEEKDAY(date_range), weekday_number)

By combining the WEEKDAY function with COUNTIFS, you can efficiently count the occurrences of specific weekdays within a given date range. This method is useful for tracking the frequency of certain weekdays over time, such as business days or weekends.

Highlighting Weekday Patterns with Conditional Formatting:

Tip: Apply conditional formatting using the WEEKDAY function to visually highlight weekday patterns in your data.

=WEEKDAY(date) >= 2 AND WEEKDAY(date) <= 6

By setting up conditional formatting rules based on the WEEKDAY function, you can dynamically highlight weekdays in different colors or styles. This technique enhances data visualization and makes it easier to identify trends or anomalies related to specific weekdays.

Creating Dynamic Date Ranges Based on Weekdays:

Tip: Use the WEEKDAY function in conjunction with DATE and DATEVALUE functions to generate dynamic date ranges based on specific weekdays.

=DATE(year, month, 1) + (desired_weekday – WEEKDAY(DATE(year, month, 1)))

By incorporating the WEEKDAY function into date calculations, you can create dynamic date ranges that start or end on specific weekdays. This approach is valuable for generating recurring schedules or planning tasks that align with particular weekdays.

Analyzing Weekly Trends with AVERAGEIF and WEEKDAY:

Tip: Utilize the WEEKDAY function within an AVERAGEIF formula to analyze weekly trends in your data.

=AVERAGEIF(range, criteria, [average_range])

By incorporating the WEEKDAY function as the criteria in an AVERAGEIF formula, you can calculate the average value of specific weekdays within a dataset. This technique helps identify patterns or fluctuations that occur on particular days of the week, aiding in strategic decision-making and resource allocation.

Frequently Asked Questions

01. What does the WEEKDAY function in Excel do?

The WEEKDAY function returns the day of the week corresponding to a given date, represented as a number from 1 (Sunday) to 7 (Saturday).

02. How do I use the WEEKDAY function in Excel?

To use the WEEKDAY function, simply input a date into the function, and it will return the corresponding day of the week as a number.

03. Can I specify the numbering system for days of the week in the WEEKDAY function?

Yes, you can specify the numbering system by providing an optional argument [return_type], which ranges from 1 to 3, indicating different numbering systems for days of the week.

04. What happens if I omit the [return_type] argument in the WEEKDAY function?

If you omit the [return_type] argument, the default numbering system is used, where Sunday is represented as 1 and Saturday as 7.

05. How can I convert the numerical output of the WEEKDAY function into weekday names?

You can use conditional formatting or create a custom formula to convert the numerical output into weekday names using Excel’s text functions.

06. Can the WEEKDAY function handle dates in different formats?

Yes, the WEEKDAY function can handle dates in various formats as long as they are recognized as valid Excel dates.

07. Is the WEEKDAY function affected by regional settings or date formats in Excel?

The WEEKDAY function’s behavior may vary slightly depending on regional settings, but it generally operates consistently across different date formats.

08. Can I use the WEEKDAY function to calculate workdays or weekends?

Yes, you can use the WEEKDAY function in combination with other functions to calculate workdays or weekends within a given date range.

09. Are there any limitations or known issues with the WEEKDAY function?

The WEEKDAY function is straightforward and reliable, but users should ensure they provide valid dates and understand the numbering system used for days of the week.

10. In what scenarios is the WEEKDAY function particularly useful?

The WEEKDAY function is handy for organizing data based on weekdays, analyzing trends or patterns, creating dynamic schedules or calendars, and automating tasks related to scheduling or reporting.

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