Playbook: Run a clean A/B test on posting time

Playbook: Run a clean A/B test on posting time
Testing posting time only works if you isolate the variable. Most people change three things and learn nothing.
—
Step 1: Hold content type constant — test time only on similar posts (e.g. all link-shares).
—
Step 2: Alternate slot A and slot B day by day for 3 weeks; never run A for week one, B for week two (trends contaminate it).
—
Step 3: Tag each variant in utm_content so you can split clicks cleanly in GA4.
—
Step 4: Compare reach-per-post and click-rate, not raw totals.
—
Step 5: Need ~15 posts per slot before the result means anything.
✔ Isolates the one variable
✔ Defends against weekly trends
✖ Three weeks of patience required
Best for: accounts past guessing and ready to measure.
Pick this if you 'feel' a time works but never proved it. Any scheduler plus free GA4 does it.