This is predicated on the idea that you're only really productive in the afternoon, and that the morning is just wasted time. I'm most productive in the mornings, and my productivity only takes a dive in the afternoon because that's when all my meetings are. Turns out, anecdotes about an individual's workflow aren't broadly generalizable!
I shifted my schedule to early morning(6-7am) just so I could get 3-4 hours of uninterrupted work in before the onslaught of meetings. Highly recommend it.