Here's the first plot below, which shows the Arrival and Dismissal time.
In the plot, notice that there are two groups of arrival and dismissal points. The first arrival points are dotted in the early morning of the day, this is due to the schedule of services of the office which opens at 8:00 am and will close at 12:00 pm. And the other one are in the afternoon, at 1:00 pm and will close at 5:00 pm. And I'm home, taking my lunch between 12:00 pm and 1:00 pm.