Excel automatic date conversion—Excel includes functions for entering dates. By combining these functions effectively, you can automatically convert and update dates by day of the week. This is useful for VLOOKUP analysis after collecting daily Excel data.
Excel Automatic Date Conversion
Two primary functions for working with dates are the TODAY function and the WEEKDAY function.
Excel TODAY Function
The TODAY function is an Excel function that returns the current date.
It returns the date in year, month, and day format, although the display can vary depending on the date format specified by the user.
The function syntax is as follows:
=TODAY()
This function requires no arguments and simply returns the current date. It is frequently used, especially when working with date-related documents or data.
Excel WEEKDAY Function
The WEEKDAY function returns the day of the week for a specific date in Excel.
It provides information about the day of the week for a given date, allowing you to perform additional processing or analysis for that date.
The function syntax is as follows:
=WEEKDAY(serial_number,[return_type])
The serial_number argument specifies the date for which you want to find the day of the week. This argument typically uses a date value or another function that returns a date value.
The return_type argument specifies how the day of the week is returned, and it is optional. If omitted, return_type is set to 1.
The return_type argument can have values from 1 to 3, each with the following meaning:
- 1: Returns a number from 1 (Sunday) through 7 (Saturday). (Default)
- 2: Returns a number from 1 (Monday) through 7 (Sunday).
- 3: Returns a number from 0 (Monday) through 6 (Sunday).
The WEEKDAY function is useful for finding the day of the week for a specific date and is frequently used for scheduling tasks and data analysis.
Automatically Convert Dates by Day of the Week in Excel
Let’s look at an example of using these Excel features.
For weekly data analysis, suppose that every Monday you need to enter the necessary values by date in the data below for a weekly analysis of the previous week’s data. The data is retrieved from stored source data organized by date using the Excel INDEX MATCH function, VLOOKUP function, XLOOKUP function, and more.
The key Excel formula is shown below.
C3 cell =TODAY()-(WEEKDAY(TODAY(),3))
After using the formula combination above in cell C3, add one day to the date beginning in cell D3.
D3 cell =C3+1
With the Excel formulas above, the data for each day of the week is automatically updated with the dates for the week that includes the latest date.
Formula Explanation
Here is an explanation of the functions used for automatic date conversion and entry in Excel.
First, use the TODAY function to return today’s date. Then, use option 3 of the WEEKDAY function to convert today’s day of the week into a number.
As a result, Saturday is converted to the number 5.
As the final step for automatic date entry in Excel, subtract the number returned by option 3 of the WEEKDAY function from today’s date to automatically return the date of Monday in the week that includes the current date.
Conclusion
Using dates and days of the week as variables in Excel is important for a wide range of tasks, including data analysis and schedule management. This can be explained for the following reasons.
First, using date and day-of-the-week variables allows you to account for time-related factors in scheduling tasks and data analysis. For example, when analyzing revenue or sales volume over a specific period, you can set the start and end dates for that period as variables in calculations. You can also process data using day-of-the-week variables to analyze differences in sales volume between weekdays and weekends.
Second, using date and day-of-the-week variables allows you to manage time more efficiently in scheduling tasks. For example, when managing a schedule in Excel, you can use date and day-of-the-week variables to check which events occur on a specific date. This helps prevent schedule conflicts and enables more efficient schedule management.
Third, date and day-of-the-week variables allow you to perform calculations using a variety of Excel functions. For example, you can use the WEEKDAY function to calculate the day of the week for a specific date or the TODAY function to calculate the current date. Using these functions makes data processing and analysis easier.
Therefore, using dates and days of the week as variables in Excel is important for a wide range of tasks, including data analysis and schedule management. It enables you to account for time-related factors, manage time more efficiently, and use Excel’s various functions to make data processing and analysis easier.