How to Enable Dark Mode in Google Calendar App on Android?br br Note: Update your Calendar App by going to Play Store, if you have not updated it.br br Step 1: Open Calendar App.br br Step 2: Tap on 'Three Bars' at the top left.br br Step 3: Tap on 'Settings', and then tap on 'General'.br br Step 4: Tap on 'Theme', and then Tap on 'Dark' at the Pop Up.