A. 1. Open the Google Calendar app on your Android device. 2. Tap on the three horizontal lines in the top left corner to open the menu. 3. Scroll down and select 'Settings'. 4. Choose your account under 'Accounts'. 5. Tap on 'Notifications' and ensure that notifications are enabled. 6. If they are enabled, try toggling them off and then back on. 7. Additionally, check your device's main settings: Go to 'Settings' > 'Apps' > 'Google Calendar' > 'Notifications' and ensure they are allowed. 8. Restart your device to apply changes.
B. 1. Check if Do Not Disturb mode is enabled on your device. Go to 'Settings' > 'Sound' > 'Do Not Disturb' and make sure it is turned off. 2. If you have battery optimization enabled for Google Calendar, it may restrict notifications. Go to 'Settings' > 'Battery' > 'Battery optimization' and find Google Calendar, then select 'Don't optimize'.