When did the US have its first launch?

Can you clarify what you mean by "the US having its first launch"? Are you referring to a space launch, a technological innovation, or something else entirely? If we're talking about a specific technological or financial milestone, such as the launch of a cryptocurrency exchange or the introduction of a new financial product, then the answer would depend on the specific context and timeline. Without more information, it's difficult to give an accurate and concise answer to your question. However, if you're asking about the US's first space launch, that occurred on February 20, 1958, when Explorer 1, the United States' first satellite, was successfully launched into orbit.