Many business apps provide date values as Epoch or Unix timestamps.
​https://en.wikipedia.org/wiki/Unix_time
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For example: 1637608895 is actually Monday, November 22, 2021 7:21:35 PM
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Use downstream tools to convert these numbers into human readable formats. For example:
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Google Data Studio
​https://support.google.com/datastudio/answer/7037300?hl=en