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. Enter a name, and set a colour code for the calendar.

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

  4. Select Done icon.

Modify the settings for a calendar
  1. In the Calendars view, select the desired calendar.

  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, and select Done icon.

Colour codes indicate which calendar an event belongs to.