You can have more than one calendar. Create one for work and another for your free time.

Select Calendar.

Create a new calendar
  1. Select Options icon > Calendars > Add icon.

  2. Write a name, then set a colour code for the calendar.

  3. Set the visibility for the calendar. When a calendar is hidden, the calendar events and reminders are not shown in different calendar views or on the home screen.

  4. Select Done icon.

Change the settings for a calendar
  1. In the Calendars view, select the calendar you want to change.

  2. Change the name, colour, and visibility.

  3. Select Done icon.

Add an entry to a particular calendar
  1. When adding a calendar event, select Calendar icon and the calendar.

  2. Fill in the fields, then select Save.

Colour codes show which calendar an event belongs to.