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What time to start sourdough to have bread by morning

Worked schedules, computed backward from the finish

Start with the only number that matters to you: when the loaf comes out of the oven. Everything else is subtraction. A straightforward loaf takes around nine hours from mixing to a finished bake in a room around 72°F, and before you can mix, a freshly fed starter wants somewhere around five hours to reach peak. Add it up and "bread by 8am" means the work started the previous afternoon.

That sounds worse than it is. Most of those hours belong to the dough, not to you. The trick is arranging the schedule so the hours that need your hands land while you are awake, and the hours that don't can run overnight. There are two good ways to do that, and they suit different evenings.

Path one: shape in the evening, the fridge works the night

Do all the hands-on work on Friday, put the shaped loaf in the fridge, and bake it first thing Saturday. The cold slows the final proof to a crawl, which is exactly what you want: it holds the dough for you until morning, and a long cold proof builds flavor while it waits. Here is the full schedule for bread at 8:00 AM, mixed at around 72°F:

Notice where the night went: into the fridge. Nothing between 7:10 PM and 7:10 AM needs you. The morning feed is the one early commitment, and it is a five minute job. If your evening is busy instead of your morning, slide the whole thing later; the fridge is forgiving, and an hour either way won't hurt.

Path two: mix before bed, the dough rises while you sleep

The other shape skips the fridge. Mix in the evening, let the bulk run long and slow overnight on the counter, then shape and proof after you wake. This is the classic no-knead rhythm, and it trades the fridge for one honest constraint: the bulk ends when it ends, and you have to be up for the shape.

For bread at 9:00 AM:

Push the same schedule an hour earlier, to an 8:00 AM finish, and the shape lands at 5:18 AM. That is the trap in most overnight-bulk timetables: they quietly assume you are the kind of person who is delighted to shape dough before sunrise. If you are not, 9:00 is the honest earliest for this path, and the fridge path above is the one that gets you 8:00 without an alarm.

Bread by noon works the same way

A noon finish through the fridge path moves everything into a comfortable Friday evening: mix at 4:11 PM, shape at 10:55 PM, the loaf goes into the fridge just before 11, and the bake starts at 11:10 the next morning. A late shape for a late sleeper. The method does not change; only the anchor does.

Your kitchen will move these times

Every schedule above assumes a kitchen around 72°F and a starter that peaks in about five hours. Both assumptions are load-bearing. Fermentation runs on temperature: a bulk written as 4 hours can run past 5 in a 66°F kitchen and closer to 3 in an 80°F one. The feed timing is the least certain number of all, because peak depends on your feed ratio and your starter's own pace. Treat every time here as a good estimate, and let the dough overrule the clock when they disagree.

That is also why a fixed timetable, this one included, can only take you so far. The times above were computed by working backward from the finish at one temperature. Your finish time and your kitchen are different, so compute your own schedule with the free planner: pick when you want bread out of the oven, set your kitchen temperature, and it works every step out to the minute, including whether anything lands between 11pm and 6am and what the fridge can do about it.