Compare this year to last year but only up to equivalent date to today

[owenv]

I've got two measures that count unique ID's. One for last year and one for this year look like this:

YTD = TOTALYTD(COUNTA('Alerts (API)'[uid]), 'Alerts (API)'[date].[Date])

YTD last year = TOTALYTD(COUNTA('Alerts (API)'[uid]), SAMEPERIODLASTYEAR('Alerts (API)'[date].[Date]))

 These both give the correct values.
However, the version for last year shows all future dates when visualised. For example, when I show the data in a KPI, the target value displays the sum for the whole of last year. What I want is the sum up to today's equivalent date for last year. I've tried filters for this but there's no way for me to filter dynamically. I don't want to have to come in every day and manually add a day.

[owenv · Accepted solution]

I fixed this using a calendar. I've been able to get by without one until now. Thanks for your input

[Greg_Deckler]

@owenv You may find this helpful - https://community.powerbi.com/t5/Community-Blog/To-bleep-With-Time-Intelligence/ba-p/1260000

Also, see if my Time Intelligence the Hard Way provides a different way of accomplishing what you are going for.

https://community.powerbi.com/t5/Quick-Measures-Gallery/Time-Intelligence-quot-The-Hard-Way-quot-TIT...