changed weight reminder schedule

README.md

@@ -163,12 +163,18 @@ npm run worker
 
 ### Overdue weight emails
 
-The worker checks every five minutes for living birds with no new weight entry in
+The worker checks once per calendar day for living birds with no new weight entry in
 48 hours. Each accepted owner, assistant, or caregiver receives one email per flock
 listing all birds due for a reminder. Pending invitees and viewers are excluded.
-Reminders repeat every 48 hours while overdue; adding a new weight restarts the
+Reminders repeat daily while overdue; adding a new weight restarts the
 48-hour clock. Birds without weights use their profile creation time.
 
+Scheduling matches hatch-day reminders: a check 15 seconds after worker startup,
+then hourly, with one queued job per local date. There is no fixed morning send
+time. Both use `MILESTONE_REMINDER_TIME_ZONE` (default `America/New_York`).
+Delivery tracking uses local calendar dates, including daylight-saving changes.
+Deploying this change removes the old five-minute Redis schedule.
+
 The clock uses the weight entry's creation timestamp, since the measurement date
 has no time of day. Editing an existing entry does not restart the clock; entering
 a historical weight does. Memorialized birds are excluded.