Just in case you don't know how Google has been teasing its various Android releases is by publishing a screenshot of a device or a software with the clock in that image pointing to the next version of Android. The company has been using this trick since the release of Gingerbread (v2.3).
The latest tease comes from Google's official Twitter account where the company posted screenshots of Google Now's new World Cup information card. If you look closely, the time on the clock says 5:00.
Even though Google is yet to announce the release date of Android 5.0, it is most likely that the company will release it at the I/O 2014 conference and might name it Lollipop (though the name is not official yet).
Currently, all the devices in the Google Play Store have their clocks set at 4:40 which points to the current version of KitKat. We are just two weeks away from Google I/O, so it could mean that we will witness the release of Android 5.0 at the end of this month. Other important announcements expected at the Google I/O includes Android TV and might also focus on the Android Wear.
For further reference, Google has used the following clock times for its various Android releases in the past:
Gingerbread (Nexus S): 2:30
Honeycomb (Moto XOOM): 3:00
Icecream Sandwich (Galaxy Nexus): 4:00
KitKat (Nexus 5): 4:40