The denomination of two dollars was authorized under a congressional act, and first used in March 1862. The denomination was continuously used until the 1960s; by this time the United States Note was the only remaining class of U.S. currency the two-dollar bill was assigned to. In 1966 it was decided to discontinue production of all United States Notes, which included the two-dollar bill. The two-dollar denomination was not immediately reassigned to the Federal Reserve Note class of United States currency and was thus fully discontinued; the Treasury Department cited the two-dollar bill's low use and unpopularity as the reason for not immediately resuming use of the denomination. In 1976, production of the two-dollar denomination was resumed and the two-dollar bill was finally assigned as a Federal Reserve Note, with a new reverse design featuring John Trumbull's depiction of the drafting of the United States Declaration of Independence replacing the previous design of Monticello. It has remained a current denomination since then. It was estimated that if the two-dollar bill replaced approximately half of the one-dollar bills in circulation, the federal government would be able to save about $26 million in 1976 dollars ($112 million adjusted for inflation) over the period from 1976 to 1981, due to reduced production, storage, and shipping costs.

Answer this question based on the passage: when did the first 2 dollar bill come out? Let's have some stream of consciousness first.

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
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The relevant information is: The denomination of two dollars was authorized under a congressional act, and first used in March 1862. So, the answer is March 1862.