Expiration Date [expiration_date] Field for Product Feed

Optional for each product (Google & ChatGPT)

The expiration_date attribute lets you define the exact date and time when a product should be removed from Shopping ads and free listings.
This is particularly useful for:

• Seasonal or limited-time items
• Event-based offers
• Products with strict availability windows

If no expiration date is provided, the listing will expire 30 days after the last feed refresh (unless refreshed again).

When to use

• For limited stock products with a fixed end date.
• For seasonal items that should disappear after a certain time.
• For promotional items tied to an event.

Expiration date works alongside regular feed refreshes — the earliest limit will apply.

Format

• Type: Date + time + time zone (ISO 8601)
• Format: YYYY-MM-DDThh:mm[±hhmm] or YYYY-MM-DDThh:mmZ
• Limits: Max 25 characters
• Repeated field: No

Formatting examples:

Minimum requirements

• Provide a date up to one year in the future.
• Use valid ISO 8601 format with time zone.
• Don’t rely on expiration date alone — continue to refresh your feed as needed.

Expiration changes may take several hours to take effect.

SEO Tip

Using a precise expiration date prevents out-of-stock or irrelevant products from showing, protecting your CTR and overall Merchant Center account health.

Official Source: https://support.google.com/merchants/answer/6324499