Two calendars share five days
Climate Week NYC 2026 runs from 20 to 27 September in New York City. Climate Group, an international non-profit, organizes the week in coordination with the UN General Assembly.
The 81st session of the General Assembly opened on 8 September 2026. Its general debate runs from 22 to 26 September and sits again on 28 September. The UN schedule places three high-level meetings inside Climate Week: climate action and the just transition on 23 September, sea level rise on 24 September, and pandemic prevention, preparedness and response on 25 September.
Climate Week NYC and the general debate overlap for five days. Climate Group reports that its official events draw over 100,000 attendees each year, across more than 1,000 events in the city.
A block of 20 to 60 rooms books from the same inventory
A delegate group at that size books from the same inventory as the delegations and their support staff.
Climate Group reports that sponsorship opportunities for Climate Week NYC 2026 are full and that it is taking enquiries for 2027. A block booked against the next cycle sets its terms before the calendar for that week fills.
The terms a hotel holds for 20 to 60 rooms depend on two things: how certain the group commitment is, and how fast the group can put that certainty into the contract.
Set the cut-off date first
The cut-off date releases unsold rooms in the block back to general sale. Put the date in the contract. Confirm it in writing.
The cut-off sets what delegates can still book after they register. A late cut-off keeps rooms inside the block and leaves the risk of unsold rooms with the group. An early cut-off returns that risk to the hotel and sends delegates into open inventory.
Set the cut-off after the programme dates are final. Until then, hold the cut-off as an open term.
Read the attrition clause for three numbers
An attrition clause sets the share of the block the group pays for when rooms go unsold. Read the percentage, the rooms it applies to, and the date the hotel measures it.
A percentage applied to the full block exceeds the same percentage applied to the rooms the group picks up. Ask the hotel to measure attrition after the cut-off date and against the rooms the group takes.
Ask for staged returns. A staged return hands rooms back on a set date at a set number, and it caps the group exposure as registration numbers arrive.
Price each night of the stay
Ask for a rate for every night of the stay. One average rate spreads a single number across nights that carry different demand, and the discount lands away from the nights the group needs.
The general debate runs from 22 to 26 September. Ask for a separate rate for the nights before it opens, the nights in between, and the nights after it closes.
Hold space while the programme moves
Hold space before the programme dates are fixed. Three contract structures do that.
A first-refusal window holds rooms for a set number of days while the group confirms its dates. Nothing is firm and nothing is paid.
A courtesy block allocates a small number of rooms with no attrition and a short cut-off. The group holds a floor of rooms and commits to little.
A two-phase contract firms a small block at signature and adds an option on more rooms. The hotel prices the option at signature, and the group exercises it by a stated date.
Each structure carries a different exposure at the cut-off. Choose the structure with the programme dates in hand, or accept a defined cost for changing them.
Checklist for the delegate group
Confirm the cut-off date in the contract. Confirm the attrition percentage, the rooms it covers, and the measurement date. Get a rate for each night of the stay. Ask for staged returns. Ask what the contract does if the programme shifts by a week.
Both calendars are public before any contract is signed. Climate Group publishes the week and its official events calendar and map. The UN publishes the provisional schedule for the high-level meetings and the general debate.