calculate number of registrants this time last year

[RE]

My organization hosts a yearly event and I am writing a report that shows guest registration. I am trying to write a measure that calculates how many people registered on this day last year. Any ideas? 

[v-huizhn-msft]

Hi @RE,

If you want to calculate how many people registered on this day last year. In your resource table, there should be the people ID and registered date. Please create measure using the formula.

count=CALCULATE(COUNT(Table[ID]),FILTER(Table,Table[registered Date]=DATE(Year(Today()),Month(Today()),Day(Today()))))

If this still don't resolve your issue, please share your sample table and list the desired result.

Best Regards,
Angelia

[MattAllington]

You need to use time intelligence https://exceleratorbi.com.au/dax-time-intelligence-beginners/