Can VLOOKUP work with Dates?

I have 2 data sheets, both entering the same data and same formula for the summary field:

=VLOOKUP("GL Golive", [Task Name]:[Start Date], 11, 0)

I am trying to get a matched start date for the row contains task name "GL Golive". However, one sheet works perfectly, the other sheet shows invalid operation. Both of the summary fields are set as Date Field.

How is it even possible for the exactly same formula work in one sheet but didn't work in the second sheet which is a copy of the first sheet?


  • Andrée Starå
    Andrée Starå ✭✭✭✭✭✭

    Hi @Smartsheet Beginner

    I hope you're well and safe!


    Can you describe your process in more detail and maybe share the sheet(s)/copies of the sheet(s) or some screenshots? (Delete/replace any confidential/sensitive information before sharing) That would make it easier to help.

    I hope that helps!

    Be safe and have a fantastic week!


    Andrée Starå | Workflow Consultant / CEO @ WORK BOLD

    Did my post(s) help or answer your question or solve your problem? Please support the Community by marking it Insightful/Vote Up or/and as the accepted answer. It will make it easier for others to find a solution or help to answer!


    Andrée Starå | Workflow Consultant / CEO @ WORK BOLD

    W: | | P: +46 (0) - 72 - 510 99 35

    Feel free to contact me for help with Smartsheet, integrations, general workflow advice, or anything else.

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