Some time after August 29, Sarah dies from leukemia after battling the disease for three years. John hits the road without knowing what will happen to his mother's body or where she will be buried after she dies.
Sarah's body is cremated in Mexico and her friends scatters her ashes into the sea.
In accordance with Sarah's will, her friends store weapons in a coffin at the Greenlawn Cemetery in Los Angeles, pretending that it is Sarah's last resting place.
Initially, Judgment Day occurs on August 29, 1997 as predicted. However, due to the presence of Guardian in the timeline, the T-800 is completely destroyed after being terminated and Cyberdyne is unable to use its CPU to start creating its Neural Net CPU. As a result, 1997 is a normal year and Skynet doesn't come online until 2017, twenty years later, as Genisys.