How can I turn the date into Unix format?

As you may already know, Date field for API have to be filled in UnixTimeStamp.
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The correct format is to express timestamp in seconds (10 characters - Epoch Timestamp)
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📌Please use this useful tool for conversion and actual date check.
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📌Keep in mind that 13 characters timestamps are in milliseconds and are not supported.

For more info about how to set it, take a look here.

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