California will stop using sell by dates on packaged food starting Wednesday, replacing them with standardized “Best if Used By” and “Use By” labels. The rule, authored by Assemblymember Jacqui Irwin, aims to cut consumer confusion that drives premature disposal. Manufacturers can adopt either label or both, giving shoppers clearer cues about quality versus safety.

Advocates say “sell by” stamps are the leading cause of household waste. Californians Against Waste estimates the state tosses about 6 million tons of still‑edible food each year, a share of the nation’s roughly 20 % waste rate. The new law also eases donations, as food banks often reject items bearing ambiguous dates.

Grocery chains report overhauling inventory systems to comply, but the California Grocers Association backs the move, calling it a win‑win for waste reduction and shopper clarity. Other states—New York, Illinois, Maryland—are considering similar statutes, and a bipartisan bill in Congress seeks a national standard. The shift turns label semantics into a practical tool for cutting waste.

With labeling uniformity now a policy lever, manufacturers and retailers must audit packaging lines, while consumers gain a simple decision point that could shave millions of pounds of waste annually.