Subway offers free footlong upgrades with meatball sub purchase on Million Meatball Monday, March 6, 2026.

Subway is launching "Million Meatball Monday" on March 6, 2026, offering free footlong sandwich upgrades to customers who purchase a meatball sub. The promotion coincides with National Meatball Day and aims to serve 1 million meatballs nationwide. Customers must buy a meatball sub to qualify for the free upgrade, which is available at participating locations.