Google has expanded Gmail Search Field Trial and now include Calendar results.
The idea behind the featue is that when you search, you'll see matching information from your calendar showing within Google's search results, when it's relevant. For example, Google shared this screenshot showing matches appearing in a search for "what is on my calendar today."
In other news, Google is now testing a new compact navigation menu with fewer services included.
The new user interface (UI) seems to be inspired by Google's Chrome app launcher, and uses less space. You need to click an icon next to the "sign in" button to access popular Google services like Google Maps, YouTube, Gmail, Google Drive and Google Calendar.
Google is also reporting a new version of navbar that remain hidden on search results pages and only shows when you visit Google homepage.
Meanwhile, those who don't like the current black navigation bar, can hide it using the following URL https://www.google.com/webhp?esrch=Agad::Public. It's used by the A Google a Day site, which shows daily puzzles you can solve using Google search. Unfortunately, this interface doesn't show very recent results (from the past week), so you can solve the puzzles on your own, without spoilers.
You can right-click the search box in Chrome, Opera and Firefox, select "Add as search engine", "Create search" or "Add a keyword for this search" and create a new search engine you can trigger using a keyword.