It's fine if it just happens in the evening,as long as you can finish meaningful work at day. I would arrange entertainment of today evening on morning as reward for day work. It might increase your productivity at day and after work you can enjoy the evening better. Or in some cases you have kind of flow of mind that continues in the evening that makes you skip arranged entertainment to do more.
One thing worth mention is you should block all the easy options (social media, video, games) at morning/afternoon. For me once I do those easy things at morning they seem to stuck at working memory for long to hurt my whole day concentration. I allow those easy options at dinner time as a small reward and block them again at 21:00 to 23:30.
