Quiet hours in Southeast Asia

Quiet hours exist to protect sleep and to keep your brand out of a screenshot that starts with “who thought this was a good idea.” They are not a growth lever. Treat them as a constraint, then measure what happens just outside the window.

In Lab week four we map three clocks: legal/policy quiet hours, observed tap density by local hour, and festival displacement. Songkran, Chinese New Year, and long weekends move density. A calendar that ignores them will look “optimised” in February and confused in April.

Bangkok is not Phuket

Tourism-heavy provinces keep later evening density. A single national send time averaged across Thailand will under-serve one group and irritate another. If your warehouse has province or city, use it. If it does not, do not invent a “SEA evening peak” from a blog post written in Singapore.

Polite is not the same as effective

We have watched teams move all promotional push to 11:00 because it felt respectable. Tap-through fell. They had not tested 18:30 locally. Respect the quiet window; do not also abandon the hour before it without evidence.

What we ask alumni to keep

A one-page calendar with blocked hours, festival notes, and the last date the tap-density chart was refreshed. If that page is older than a quarter, the policy is folklore. Related: queue latency — a late worker can shove a “18:30” send into quiet hours accidentally.