I'm managing 5 websites, and have created one base with 5 tables - each reflecting the blog planning for one website (syncing with the website-specific bases). I've now created a table that collects all the posts from all the websites, so I can see where everything is at in a blink of an eye. 

What I can't wrap my head around is the dates: I now have 5 date fields (lookups), but I'd like to be able to sort things by date (or display them in a calendar, etc) - regardless of which website it's for. I created a formula field to merge the dates, but that displays them as "2015-01-01T00:00:00.000Z"... I know there's a DATESTR([date]) formula, but that gets me an error message (am I using it wrong?). 

Any help would be greatly appreciated!