Hidden Time in Calendars: How Showing or Hiding Weekends Affects Planning

Digital calendars help people decide when to do things. They show a week at a time, and users can move events around by dragging or picking slots from a list. The study looked at whether the weekend is visible in this week view and how that changes the way people plan. Researchers watched 105 people use two kinds of calendars. One used drag‑and‑drop; the other let users pick a slot from a dropdown menu. In the second type, they sometimes hid the weekend column. Even when weekends were hidden, evening times still appeared. Each time a person tried to put an event in a slot, the researchers recorded how many attempts it took. Some people needed only one try; others tried up to seven times. Every attempt was linked to where the user looked on the screen. The eye‑tracking data were split into early, middle, and late stages of each attempt.The results showed that every extra attempt added about 56 % more time spent looking at the calendar. Tasks that were personal required more attempts than work tasks. When the weekend was shown, people spent extra time checking those slots toward the end of each attempt. When the weekend column was hidden, people scheduled fewer events on weekends. Instead, they moved those plans to evening slots or other nearby times. This shift shows that the visible horizon of a calendar can change where people choose to put their activities. The study highlights that designers can use the presence or absence of weekend columns as a tool to influence how users think about time. By adjusting what is shown, interfaces can nudge people toward certain planning habits.