Send Time by Timezone Optimizer
Find the best send time for subscribers in any timezone — so your 9am UK send isn't a 3am send for your Australian audience.
Configure Your Audience Timezone
24-hour format, UTC. 9 = 9am UTC.
Your Recommendation
Recommended send time
Mid-morning (10am local) for UK / Ireland (GMT)
Your current schedule in their time
9:00 local time for UK / Ireland (GMT)
This lands within reasonable engagement hours.
Why Timezone Matters
A single global send time is a compromise that serves nobody perfectly. A 9am UK send reaches US subscribers at 3am ET and Australian subscribers at 6pm. Timezone-based send optimisation delivers your email to each subscriber during their local peak engagement window — typically mid-morning.
Most ESPs support timezone sending (often labelled "send in recipient timezone"), which requires a timezone field on your subscribers. If you don't collect it, the next best option is segmenting your list by region and sending multiple waves.
Related: Email Send Time Optimizer and send time optimisation research.