It very depends on your personal healing properties, and unless if you had similarly invasive facial surgery before, you can't really predict how will you healing and recovery go.
Upper face usually isn't most problematic. Shurely in first two weeks you will have swelling around the eyes, possibly some bruising. Most of the swelling goes down and it gets stuck in your lower face. Because you won't have any aggressive lower face work, you will be able to do very strong massage (and use lots of ice-packs) which helps with circulation in lower face area, and will help you to get rid of that swelling much sooner compared to someone who had more aggressive lower face work, and can only do really gentle massage. For example it could take you around 3 weeks to get rid of 90% of lower face swelling, in comparison to someone with more aggressive bone and soft tissue work in lower face, which could take them 2-3 months for the same 90%.
It's possible you will look presentable at 1 month, maybe even little sooner. Arrange for longer time off if you have the possibility.