They didn't have any money or a way of telling time since the time machine wasn't actually a watch so they had to wander around until they found a library and could look up how far they were from the SheaTech building. After that, it took them nearly forty-five minutes to walk there.
They were both absolutely exhausted but the timing worked out alarmingly well. They managed to spot their father, looking slightly younger than in 2018 with a different haircut, about to get into his car in the parking garage.
Subtlety was a luxury they didn't have right now. Edison sprinted ahead of his sister and jumped in front of the car as it began driving away. It screeched to a halt and Julian came out to yell at him.
"What are you doing, you crazy kid? I could have killed you!"