Reference a measure in another measure

I just realized I made a mistake in my code. That code for Last Entry will return the date of the last entry, not the last entry itself. Looking back at your original formula I think it should be

Last Entry = CALCULATE(
	LASTNONBLANK( 'Trends'[Total Unresolved], 1),
	DATESMTD(DateTable[Date])
)

...or whatever the column is with the number you're trying to tally. Not the timestamp column.

Now, if you really really want to have that last date with an entry, add a third measure:

Last Date = CALCULATE(
	MAX('Santiago Trends'[action_timestamp]),
	DATESMTD(DateTable[Date])
)

You could use my original mistake version of Last Entry, but this version also works, and is slightly easier to type.