Watch the full episode on Crunchyroll to see Goku's mountain adventure: Dragon Ball Z (English Dub) | E288 - He's Always Late Crunchyroll• Mar 15, 2022
Instead of heading to the party, Goku is on a mountaintop protecting a nest of dragon eggs. He spends the day shielding the eggs from harsh weather and potential predators.
Chi-Chi, frustrated by Goku's typical lack of punctuality, eventually leaves him behind and takes Gohan and Goten to the party without him.