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Helper II

Indexing dates of the year

Hi, I would like to index the dates of each year (2019, 2020, 2021) so that I can match the index to the previous year's date.

So 2019 would have the index on the dates, and then I could match the 2020 index to the 2019 dates. Kind of like SamePeriodLastYear, but I am not able to use this with my current data, as the original ID's are all different throughout the years. Please help, I can explain more if needed. I am looking at quotes sent throughout the years, and would like to compare then YoY, but cannot do so without being able to connect the quotes to a primary key. I was thinking the index would become the primary key. Thank you in advance.

1 ACCEPTED SOLUTION
Super User

Hi,

I am not sure if I follow, what you are describing would be day of year? You can get day of year with this calculated column dax:

DayOfYear = DATEDIFF(STARTOFYEAR('Calendar'[Date]),'Calendar'[Date],DAY)+1

I hope this post helps to solve your issue and if it does consider accepting it as a solution and giving the post a thumbs up!

Proud to be a Super User!

3 REPLIES 3
Super User

Hi,

I am not sure if I follow, what you are describing would be day of year? You can get day of year with this calculated column dax:

DayOfYear = DATEDIFF(STARTOFYEAR('Calendar'[Date]),'Calendar'[Date],DAY)+1

I hope this post helps to solve your issue and if it does consider accepting it as a solution and giving the post a thumbs up!

Proud to be a Super User!

Helper II

Thank you! Will this work year over year? So I would like a 1-365 from 2019, but also 1-365 to 2020, and so on. Would I need seperate date tables for this?

Super User

You would need separated table or some other logic to address leap years. The problem is that leap years will have numbers from 1-366.

Proud to be a Super User!

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