Wow! This is really cool! Google Keep now supports reminders! That means that it will be harder for me to choose if I should use Evernote or Google Keep? Hmm…. A very nice feature that you add Google! Thanks, I hope it works internationally though, because you say that it works together with Google Now… And Google Now doesn't have reminders in any other language than English..
Update: That's cool, while waiting for the Google Keep update should arrive, you can start making reminders in the web version here: https://drive.google.com/keep/
Update 2: If you can't wait for the Google Keep update, download it from here: http://www.androidpolice.com/2013/08/21/google-keep-app-gets-major-update-supports-time-location-based-reminders-adds-slideout-navigation-more-photo-options/
Notes are a good way to keep track of all you have to do, but most of us need a little nudge now and then. Google Keep can remind you of important tasks and errands at just the right time and place. For example, Keep works with Google Now to remind you of your grocery list when you walk into your favorite grocery store, and nudges you on Thursday night to take out the trash.
To get started, select the “Remind me” button from the bottom of any note and choose the type of reminder you want to add. You can add time-based reminders for a specific date and time, or a more general time of day, like tomorrow morning. Adding a location reminder is incredibly easy too—as soon as you start typing Google Keep suggests places nearby
Source: Here, there and everywhere: Google Keep reminds you at the right time | Official Android Blog