User blog comment:Unrulyruby100/Timeline for Dishonored - six days/@comment-1500935-20140110121039

I remember doing one too, but more based on the assumption that most missions were related to one day specifically (8 days in total), with the exception being The Royal Physician and Lady Boyle's Last Party happening one right after the other, and of course the last two missions. Still I believe yours, based on daytime, is more correct, except maybe for the first day. I think Corvo would have taken a longer recovery, at least the whole day because of his 6 months treatment at Coldridge. Also for The Light at the End, I'd suggest to refer only to the sky in low chaos, because high chaos is more a heavy storm than night (not sure we can see the moon during it), which brings the mission on the same day as The Loyalists, so Day 6.

Now to further expand your timeline with the DLC, I know that A Captain of Industry happens after Corvo's escape from Coldridge (wanted posters and the butchers talk about capturing him), that Eminent Domain happens probably the same day right after and that The Surge, which should happen before or on the same day as High Overseer Campbell (Hume took his orders from Campbell, not Martin), happens while Daud is returning from the Legal District. And so I think The Knife of Dunwall must happen during Day 1, or at least the same day as High Overseer Campbell in your timeline.

For The Brigmore Witches, well we only know for sure that The Dead Eels happens the same day as Lady Boyle's (Dead Eels mentioning the party), so Day 3. For A Stay of Execution, I'm not sure if Sokolov is already reported missing the same day, but the mission is happening at night and The Dead Eels seems to be the day right after, also the captured overseers are still present so I'd guess Day 2. Finally for Delilah's Masterworks, it has to happen before the Flooded District. I think I remember that Delilah wanted to strike while the Loyalists were reaching their goal so it's probably Day 4, which could have left them plenty time to go back to their base in Dunwall and clean off the remaining overseers. And so I will say The Brigmore Witches happens on Day 2 to 4.

UPDATE: Galvani states in his journal that the Boyle party is happening on the 24th of the 7 month, the month of High Cold. You can probably pin the precise date on each day with that, without the year of course.