How do I complete a reminder?
Complete a reminder to clear it — completing writes through to Google Tasks. Changes are recorded in Activity. You can complete a reminder by voice or text, or from the reminder's card.
Because reminders are backed by Google Tasks, completing one here marks it done in Google Tasks too. If you completed one by mistake, tap Undo on the notice that appears, or mark it not-complete again from your reminders list, and it comes back — in Lonzo and in Google Tasks.
Move a reminder to tomorrow. On your Agenda, a reminder with a due date offers Tomorrow. Choose it and the reminder's due date changes to tomorrow, your time — in Lonzo and in Google Tasks, which keeps a date without a time of day. The move is recorded in Activity. Changed your mind? Tap Undo on the notice that appears, and the reminder goes back to its old date. A reminder that is already due tomorrow or later, or that has no date, doesn't offer Tomorrow. If you want a different date, ask for a new reminder on the day you want it — for example, "remind me to send the contract Friday."
Reminders can't be snoozed: moving one to tomorrow changes its date for real, rather than hiding it for a while.
Snooze is for two other kinds of item on your Agenda: a task Lonzo pulled out of an email, and a follow-up Lonzo is tracking for you. Open the item and choose Tomorrow or Next week; on your phone you can also swipe its row to Tomorrow. The item leaves your Agenda and comes back at the next 8 AM your time, or at 8 AM next Monday. If the item is due sooner, it comes back at 8 AM on its due date instead, and when that moment has already passed, snooze isn't offered. Snoozing only hides the item: nothing changes in Gmail and nothing is recorded in Activity. To undo it right away, tap Undo on the notice that appears.
See also: Where do I see what's due? · How do I undo an action?