Clash of Clans Hammer Jam starts: what the upgrade and collector boosts cover
From November 1 to 16, eligible Home Village upgrades cost and take half as much; Supercell also spells out the exclusions.
Hammer Jam is underway in Clash of Clans international, and Supercell’s dedicated notice adds the detail behind the dates on its monthly calendar. Eligible upgrades are cheaper and quicker, while resource collectors receive a boost. The event is open to players at Town Hall 3 and above.
Upgrades and collectors move together
During the event, eligible upgrades using Gold, Elixir or Dark Elixir receive a 50% reduction in both resource cost and upgrade time. The Forge also gets 50% off its resource costs and crafting time. For example, an eligible four-day upgrade costing four million Gold would take two days and cost two million during the event.
Gold, Elixir and Dark Elixir collectors each have double production and double capacity. Together, the changes lower the investment needed for eligible upgrades and give collectors more room before they fill. A full collector still stops producing.
Where the event applies
The discounts and boosts apply to the Home Village only: Builder Base and Clan Capital are excluded. Supercharges and Crafted Defenses are also excluded from the cost and time reductions. Supercell specifies eligible upgrades, so the in-game display remains the place to check an individual item rather than assuming everything is discounted.
Hammer Jam runs from November 1 at 08:00 UTC until November 16 at 08:00 UTC. Both endpoints fall at 15:00 in western Indonesia and Thailand, or 16:00 in the Philippines. The monthly overview labels the event November 1–15; the dedicated notice provides the precise ending time.
Supercell also previews Treasure Hunt from November 16 at 08:00 UTC to November 23 at 08:00 UTC for Town Halls 3–17. The two events do not have identical eligibility, and further details are needed for the latter’s activities and rewards. This article is based on official announcements, not hands-on testing of individual accounts.
Supercell official Hammer Jam announcement
