Harmony Dreamtime Max expiration date
Harmony says the Dreamtime Max expires 6 years after its date of manufacture. A seat made in May 2024 can be used until May 2030.
"! T opreventinjuryduetodeterioration,hiddendamage,etc., discontinue use of this booster seat if it is older than SIX (6) YEARS."
From Harmony's Dreamtime Max manual, checked 2026-11-07.
When does my Dreamtime Max expire?
Enter the date of manufacture from the label on your seat. It is not the date you bought it.
Key takeaways
- Harmony Dreamtime Max: 6 years from the date of manufacture.
- Type: booster seat.
- Count from the date on the label, not the purchase date.
- If the label prints an expiration date, that date wins.
Where to find the date on the Dreamtime Max
"There is an expiry date for use of this booster seat indicated on the underside of the booster seat base." (Harmony)
Replacing an expired Dreamtime Max
Buy new rather than used: a used seat's crash history and real age are hard to know.
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When to replace a seat before it expires
- After a moderate or severe crash. NHTSA lists the conditions under which a seat can stay in use after a minor one: car seat use after a crash.
- When the label with the date of manufacture is missing and the maker cannot tell you the date from the serial number.
- When the seat has a recall that has not been fixed. Register the seat with its maker so recall notices reach you.
- When your child is past the seat's height or weight limit, whatever the date.
Before you throw an expired seat out, cut the harness straps and write EXPIRED on the shell so nobody picks it up and uses it.
Other Harmony booster seats
Every lifespan on this page is quoted from the seat maker's own product page, manual or expiration guide, and the quote was checked against that page on the date shown. If the label on your seat prints an expiration date, that date wins.