This is a direct quote from the linked article:
"The Jaguars will unveil their new uniforms one week prior to the Draft at the team’s annual State of the Franchise presentation on April 19. The Draft Party will feature on-stage appearances by notable players, giving fans a chance to see the uniforms in action for the first time"

The uniform unveil is still the 19th, nothing to get confused about. I do find it weird that they'll "unveil" the uniform but not have players wearing them at the State of the Franchise thing. I've only ever seen a uniform unveiling where the players come out wearing them for the 1st time.

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