How do I concatenate two date fields?

[Katelynn_Straw1]

I have a table with one field for start date and one field for end date. These dates are looked up from another table. I want to have a field that shows a concatenate of the two.
Here is what I have:
CONCATENATE({Estimated Start Date},"-",{Estimated Completion Date})
This is what it’s returning
2020-02-24T00:00:00.000Z-2020-02-29T00:00:00.000Z

I want it to look something like, MMDDYY-MMDDYY

Thanks for any assistance you provide!

[kuovonne]

You need to use a formula to format the date:

DATETIME_FORMAT({Estimate Start Date}, 'MMDDYY') & "-" & DATETIME_FORMAT({Estimated Completion Date}, 'MMDDYY')

I find using the & operator to join strings to be easier to read than the Concatenate formula.

eta: Converted curly quotes to straight quotes. I originally typed the example on my phone where formatting was more difficult.

[Jeremy_Oglesby]

kuovonne:

eta: If you copy/paste my formula, you might need to cover the curly quotes to straight quotes.

Here’s a copy-paste safe version of @kuovonne’s formula:

DATETIME_FORMAT({Estimate Start Date}, 'MMDDYY') &
"-" &
DATETIME_FORMAT({Estimated Completion Date}, 'MMDDYY')

[Katelynn_Straw1]

Thank you both!! I have never used & and wasn’t sure where exactly to put the DATE_FORMAT on my concatenate.

[erinhorn12]

I am trying to join these two that use Dates in the field. I know I need to use the DATE_FORMAT but when I put the formula together it returns an #ERROR code. What am I doing wrong? 

DATETIME_FORMAT({Date PL NT}, 'L') & '-' & DATETIME_FORMAT({Date of PL Local Orders}, 'L')