Introduction
In Power Automate, there is a common task to extract the complete day of the week from the given date, for this DayofWeek function will be used. Here in this example, we will see how to extract the name of the day in a week.
Step 1
Login to the required Power Apps environment using URL make.powerapps.com by providing username and password and click on Flows on the left-hand side as shown in the below figure.
Step 2
After step 1, click on New Flow and select instant cloud flow and provide the trigger as Manually trigger a flow and click on Create as shown in the below figure.
Step 3
After step 2, name the flow as DayOfWeek, and to hold the weekday’s names we must use Array with week names. So, click on + New Step and Choose Initialize operation and provide,
Step Name: Initialize variable - Weeks Array
And,
Name - Days of the Week
Type - Array
Value
[
"Monday",
"Tuesday",
"Wednesday",
"Thursday",
"Friday",
"Saturday",
"Sunday"
]
And click on save as shown in the below figure.
Step 4
After step 3, we have to get the current date and time now by using the utcNow() function for this click on + New Step and Choose Compose Operation from actions and provide the following step name as Get UTC Date and Time now and provide input as,
utcNow()
And click on save as shown in the below figure.
Step 5
After step 4, to get the day of the week we use dayOfWeek which expects timestamp as a string,
dayOfWeek(timestamp:string)
Give Step name as getting the Day of the Week (Number).
And provide value from Step 4 as an argument to the function like below,
dayOfWeek(outputs('Get_UTC_Date_and_Time_now'))
as shown in the below figure.
Step 6
After step 5, the output of Step 5 will provide only integer value, but we need the week full name, so take another action and name it as Get the Day of the Week(Name) and provide inputs as,
variables('Days of the Week')[sub(outputs('Get_the_Day_of_the_Week_(Number)'),1)]
Where variables ('Days of the Week') is taken from Step 3, the sub is the function which is used to subtract a value with the given number, so here for sub-function argument value is given which is the output of step 5, as we considered array and its index start from 0, we have to decrease 1 number from the output of Step 5 and click on Ok/update and save flow as shown in the below figure.
Step 7
After step 6, save and run flow and observe output from Step 5 and Step 6 as shown in the below figure.
Note
- Make sure to save and run the flow whenever you try expressions.
- MS documentation is found here.
- In Step 7, the index of 3 in the array given in Step 3 is Thursday but actually current date where this article was written was Wednesday, so that’s why another power automate function sub was used to remove 1 from the total index, as the array index starts from 0.
- This article focuses on adding days based on the current date, similarly dayOfYear, dayofMonth also can be used.
Conclusion
In this way, we can easily get the name of the day in a week with the current date in Power Automate flow.
Venkatasubbarao PolisettyPosted Feb 20, 2023, 4:57 PM
Hi Jianyu Yang thanks for taking time to read article! You can decide an array as per your convivence , here the aim of this example was to introduce dayofWeek function and remaining you can change as per requirement
Jianyu YangPosted Feb 20, 2023, 4:03 AM
But dayOfWeek will return 0 if the date is Sunday. So it will retrun error when you sub 1 in this situation. you can make the Sunday is the first one in your arrays and don't need to sub 1 in your flow. thanks!
Vinay AyinapurapuPosted Sep 6, 2021, 5:47 AM
Very detailed and thanks for step by step