Date Calculations

[hildasteyn]

I am new to Power Automate so I am playing with simple little things just to get a feel for this.

See the screenshot of my flow as it is now.

Daily Schedule: it runs once a day in the morning - no problem there.

Get Client Information - data is in dataverse.

Today: formatDateTime(utcNow(),'MM-dd')

Condition: checks if DOB column contains the MM-dd.

If true, sends a email to the customer service manager.

It works! Now, I want to improve the email by giving the age of the client.

Here is what I THINK should happen - please tell me if this will work.

I have to create a variable for the current year, another variable for the birth year, and do a calculation to determine the age. 

If I am right, please give me some guidance on how to make it happen.

[efialttes]

@hildasteyn 

If it's enough for you to substract years, you can get current year by means of the following WDL expression

int(formatDateTime(utcNow(),'yyyy'))

...follow the same procedure to transform birthday into year of type int...

int(formatDateTime(<birhthday date here in ISO 8601 format>,'yyyy'))

...and finally use WDL function sub() to do the math:

sub(int(formatDateTime(utcNow(),'yyyy')),int(formatDateTime(<birthday in iso 8601 format here>,'yyyy')))

Or, if you wanna be a bit more precise, I guess you can substract birthday from current date. If so, please have a look to Tom Riha's blog here on how to calculate difference between two date time strings by means of ticks difference:
https://tomriha.com/how-to-calculate-difference-between-two-times-in-power-automate/
Hope this helps!

[LinnZawWin · Accepted solution]

@hildasteyn 

Since you are only picking the records with the same day and month, you can simply calculate the age by subtracting the year of the DOB from the current year.

Here's the expression for it and you just have to replace the logical name of the DOB column in the following one.

sub
(
   int(formatDateTime(utcNow(), 'yyyy')),
   int(formatDateTime(items('Apply_to_each')?['xyz_dob'], 'yyyy'))
)

[hildasteyn]

Okay you are my hero for the day! Thank you so much!