In the monthly overview of the calendar, only the days as well as the current month are displayed, and the LG smartphone's calendar settings allow us to also display the calendar weeks (KW).

Android 9 | LG UX 9.0
Week Number -  Open the  Calendar -App
Week Number -  Open the  Menu
Week Number -  Open the  Settings
Week Number -  Tap on  Calendar
Week Number -  Enable or Disable  Show week number
  1. Open the Calendar-App
  2. Open the Menu
  3. Open the Settings
  4. Tap on Calendar
  5. Enable or Disable Show week number

LG Instructions