Google Calendar is one of the products with a new look, and the product team describes the rationale of these changes to their product designs:
- Focus: clear out clutter and focus on what matters
- Elasticity: make transitions between products, and between desktop and mobile, seamless
- Effortlessness: make things easy while providing powerful features in the background.
You'll discover similar design treatments in search and other Google products, which helps to tie the products together and create overall cohesion that Google has lacked in the past. Kudos to their design team.
Changes to the look of Google Calendar