A September on-sale date does not mean a September print date. Between file lockdown, proofing, press time, and ocean transit, most publishers need to submit final files by mid-July to hit a September newsstand window reliably.
Air freight buys back roughly three weeks at a materially higher per-copy cost. For most monthly and quarterly titles, the math favors planning further ahead over paying for speed.
Build your production calendar backward from the on-sale date: subtract delivery transit time, then press and bindery time, then proof approval time, then file review time. Whatever's left is your real submission deadline.
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