You can complete this chapter by simply loading a private game and sitting in the first room until 9pm just like chapters 2 and 3. You do not have to complete any objectives except the one to run to the safe room at 9pm on both days. In order to unlock chapter 3 you have to complete a number of missions in chapter 2. I believe it is 8 missions but if you highlight the chapter at the start of the game it will tell you what you need in order to unlock it.