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Maria Pezman
Typo in Map .NET Concepts to the Lightning Platform
https://trailhead.salesforce.com/content/learn/modules/apex_basics_dotnet/mapping_concepts?trailmix_creator_id=00550000006yDdKAAU&trailmix_id=prepare-for-your-salesforce-platform-developer-i-credential
In the "Data Types" section, it lists "Data" as a primitive instead of "Date".
I would suggest you send your feedback from below link so that trailhead team would get notified.
https://trailhead.salesforce.com/en/help
Best Regards,
Sandhya