Open the Google Calendar app or Google Assistant
Tap the Create button or say “Hey Google, remind me…”
Enter the reminder title
Set the date and time
Choose whether to repeat, if needed
Save the reminder
Open the Clock app if you want to set an alarm instead
Tap Alarm
Tap the plus button
Set the time
Save the alarm
Open the Google Tasks app if you want a task reminder
Tap Add a task
Enter the task name
Set the date and time
Save the task