With version 5.7.25 of Google Calendar published on June 15, the app added one feature that we've always wanted and sort of gave up on having: drag-and-drop for events. But it took until Reddit user Racing24 noticed it yesterday for us to go back a few versions and track the change down to that specific release of Calendar.
How it works is simple. With your Calendar open on the day view, 3-day view, or week view, you can hold any event and drag it to another time slot.Read More
PSA: Google Calendar added a drag-and-drop gesture for moving events to different times and days was written by the awesome team at Android Police.