Sale Price Start Date [sale_price_start_date] Field for Product Feeds

Optional for ChatGPT

The sale_price_start_date attribute defines the start date of a promotional or discounted price.

This field allows ChatGPT to understand when a sale becomes valid, ensuring that promotional pricing is applied only during the intended period.

It works together with sale_price_end_date and replaces legacy date-range approaches.

When to use

Use this field when a product has a time-bound promotional price with a defined start date.

This field is recommended if:

• You provide a sale_price

• Your promotion does not start immediately

• You want ChatGPT to respect promotion timing

• [sale_price_start_date] must be provided in ISO 8601 date format.

Format

• Type: Date
• Format: ISO 8601 (YYYY-MM-DD)
• Repeated field: No
• Schema.org property: Not applicable (AI-only field)

Examples:

Minimum requirements

• Use a valid ISO 8601 date (YYYY-MM-DD).
• Ensure the start date is before sale_price_end_date (if provided).
• Ensure consistency with your actual promotion dates.
• Do not use date ranges or timestamps.
• Do not provide a future start date for an already active sale.

SEO / AI Tip

Clear promotion start dates help AI systems:

• apply discounts at the correct time,
• avoid premature or incorrect sale displays,
• maintain pricing accuracy.

If the promotion timing is ambiguous, ChatGPT may ignore the sale price entirely.

For best results, pair this field with:

• [sale_price_end_date]
• [sale_price]
• [price]

Official Source: ChatGPT Product Feed Specs