You may also be looking for the comic book entitled "Class Reunion"

A class reunion was a planned event at which members of a past school class came together again.

In 2370, Counselor Deanna Troi visited Starbase 231 for her class reunion, which lasted three days. While there, she reconnected with old friends that she had lost touch with. Later, when she asked William T. Riker about the possibility of taking the Bridge Officer's Test, she mentioned the reunion as one of the incidents that made her consider it. Riker surmised (correctly) that several of her re-acquaintances had since taken the test. (TNG: "Thine Own Self")

In 2375, Captain Kathryn Janeway joked about having a 'class reunion' with the members of Species 8472 who had taken the form of Starfleet officers and cadets on Terrasphere 8, as a way of ending hostilities. (VOY: "In the Flesh")

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