Zenbu Misemasu Toshi Wasure Dragon Ball Z
From Dragon Ball Encyclopedia, the ''Dragon Ball'' wiki
Zenbu Misemasu Toshi Wasure Dragon Ball Z (全部 見せます 年忘れ ドラゴン ボール ゼット, Zenbu Misemasu Toshi Wasure Doragon Boru Zetto; Literally meaning "Whole Showing Year-End Drinking Party Dragon Ball Z") is a Dragon Ball Z TV Special. It premiered on Fuji Televison on December 31, 1993 between "Trunks vs. Goten" and "Best of the Boys".
This TV Special has neither been released on DVD nor translated to English. It was not included on either of the Dragon Boxes. This TV Special is sometimes confused with Kyokugen Batoru!! San Dai Chō Saiyan Supesharu which featured Goku and Gohan discussing the films of the series while wearing tuxedos.
Zenbu Misemasu Toshi Wasure Dragon Ball Z is believed to take place some time around the 25th Tenkaichi Tournament. Son Gohan and Son Goten were having a hot bath outside in the middle of Winter when Goku suddenly appeared using Instant Transmission. How he appeared in the Mortal Realm is unknown, but he joined his sons in the tub and they reflected back on the events that had occured during the Cell Games. Later, Chichi appeared and they all went inside the house, dressed nicely, and the TV Special ended.
This film cannot be placed in the main timeline. This is because at the 25th Tenkaichi Tournament, it was the first time that Gohan, Chichi, or any of the Z Warriors had seen Goku in seven years. It was also the first time that Goten had meet his father. The events in this film neither occur before the tournament nor after because of all the events with Majin Boo.