Birthdate different from today date

Hello Dear Kobo Community,

I am building a questionnaire. One question, very classic, is the birth date. I realized some surveyors, going too fast, put the date of the day to put the birth date.
To avoid that, I put the no-caledar aspect to the birth date question, but I would like to add a validation if the birth date is still the same as today.
Could you help me?

Welcome to the community, @civitas! Did you mean you wish to have a constraint that will pop up when the data of birth is the day filling the survey date?

Yes, exactly.

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@civitas, this post discussed previously should help you solve your issue: