It must be right when the monsters first arrived on Earth and the disaster started to unfold.
In *Independence Day: Resurgence*, Brother Liu lured away both the harvesters and the white sphere. At least by the end of the film, Earth was spared the catastrophe it was supposed to suffer.
The main cast wouldn't die in *Independence Day* anyway, so there was no point in even thinking about preserving memories of that film. However, since he saved so many ordinary people, the entry timeline was probably pushed way back.
Chapter 268