"usage limit reached." Mid-flow, at the worst possible moment. What if that line never landed when you need it most?
The thread running through this article fits in one sentence: your 5-hour window starts at your first prompt, so you decide when your Claude day begins. All that's left is to make that choice while you sleep.
The problem: the 5-hour wall
If you use Claude (and especially Claude Code) heavily, you know the moment: mid-refactor, mid-feature... "usage limit reached." Blocked. Come back in a few hours.
Why? Claude runs on a rolling 5-hour window. And the detail that changes everything: that window doesn't start at midnight, or at any fixed time. It starts the exact moment you send your first prompt.
