Lock screen widgets on Android can be time-savers, giving you quick access to information and apps. Some of the default lock screen widgets that are available include clocks, message lists, music players, and calendars.
The Neat Calendar Widget is a lock screen widget that displays your Google Calendar's agenda. Neat Calendar is more configurable than the default Google Calendar widget and arguably more attractive.
After installing Neat Calendar on your Android 4.2+ device, go to your lock screen and add it from the list of available lock screen widgets. The config screen will appear first, allowing you to choose which calendars to display and how you want the widget to look.
Once you've finished configuring the widget, you'll see your upcoming events and the number of days or minutes till the event. Selecting an event will launch your default calendar app. You can also tap between the clock and the date to launch the monthly view.
Keep in mind that on some phones, like the Samsung Galaxy S4, lock screen widgets are only supported when the lock screen isn't secured with a lock pattern, PIN, or password.