SHA-1 reverse for 631a78f415e019238b087a317a55e386e0c1a404

The SHA-1 hash:
was succesfully reversed into the string:
Happy New Year!

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Reverse a SHA-1 hash

You can generate the SHA-1 hash of the string which was just reversed to have the proof that it is the same as the SHA-1 hash you provided:

Convert a string to a SHA-1 hash