New York Independent System Operator
Installed Capacity
Event Calendar
Event Schedule
Legend:
Winter Season Event Summer Season Event Season Change Event

Monday Nov 03, 2025
    08:00 AM     IMPORT RIGHTS - ISO notifies Requestors of Priority and if Import Rights Requests were accepted or rejected
    05:00 PM     ECR - Deadline to create bilaterals for External CRIS Rights and submit supporting docs for Dec ICAP
    05:00 PM     ESTIMATED LOAD - Deadline for TOs to provide estimated load position by LSE for Dec 1
    05:00 PM     IMPORT RIGHTS - ISO posts the remaining available Import Rights
    05:00 PM     LOCALITY EXPORTS - Deadline to notify NYISO of Locality export to External Control Area for Dec
    05:00 PM     SCR - Deadline for MPs to import resource response data into DRIS for August 20th SCR Summer 2025 Performance Test #1
    05:00 PM     UDR - Deadline for UDRs to submit each qualified resource I.D. with each MW amount for Dec
Tuesday Nov 04, 2025
    05:00 PM     AFFILIATES - Deadline to request additions/deletions to affiliate list of new org names for Dec
    05:00 PM     SCR - Enrollment Period for auction month of Dec Closes
    05:00 PM     UCRs - ISO provides UCRs to LSEs
Wednesday Nov 05, 2025
    08:00 AM     MONTHLY AUCTION - Bid period opens for Dec Monthly Auction
    08:00 AM     MONTHLY AUCTION - Offer period opens for Dec Monthly Auction
    08:00 AM     SCR - RIPs may begin to view and take action on the ACL data requests for Dec
    05:00 PM     TRUE UP - Deadline for TOs to provide initial true-up load shift (actual data) for LSE activity 3 months prior. The submitted initial True-Up data is visible to LSEs.
    05:00 PM     TRUE-UP - True-Up Challenge Period Opens. LSEs review the initial True-Up data and work with TOs on data adjustments, if needed.
Thursday Nov 06, 2025
    05:00 PM     MONTHLY AUCTION - Bid period closes for Dec Monthly Auction
    05:00 PM     MONTHLY AUCTION - Offer period closes for Dec Monthly Auction
    05:00 PM     SCR - RIPs deadline to report resources with partial PTID Sales for Nov in DRIS
Friday Nov 07, 2025
    05:00 PM     DMNC - Deadline to submit DMNC data for Existing Generators to ensure can be used for Jan
    11:59 PM     AGG DMNC - Monthly Deadline to submit DMNC Test Data for Enrolled Aggregations, effective Dec 2025
Monday Nov 10, 2025
    05:00 PM     IMPORT RIGHTS - ISO posts the remaining available Import Rights after Monthly auction
    05:00 PM     MITIGATION - Deadline to submit Going Forward Costs for generators in NYC for Feb Spot Mkt
    05:00 PM     MONTHLY AUCTION - ISO posts results of Dec Monthly Auction
Tuesday Nov 11, 2025
    08:00 AM     IMPORT RIGHTS - First Come First Serve - begin to submit requests
    05:00 PM     AFFILIATES - Deadline to select or de-select affiliate names for Dec ICAP Market
    05:00 PM     IMPORT RIGHTS - First Come First Serve - deadline to submit requests
Wednesday Nov 12, 2025
    08:00 AM     IMPORT RIGHTS - First Come First Serve - begin to confirm requests
    08:00 AM     SCR - Aggregation Management Period for Dec Opens
    08:00 AM     SCR - Strike Price Management Period for Dec Opens
    05:00 PM     IMPORT RIGHTS - First Come First Serve - deadline to confirm requests
    05:00 PM     IMPORT RIGHTS - ISO will announce if Import Rights are fully allocated/returns allowed
    05:00 PM     TRUE UP - True-Up Challenge Period Closes.
Thursday Nov 13, 2025
    08:00 AM     IMPORT RIGHTS - ISO notifies Requestors of Priority and if Import Rights Requests were accepted or rejected
    05:00 PM     IMPORT RIGHTS - ISO posts the remaining available Import Rights
    05:00 PM     SCR - Aggregation Management Period for Dec Closes
    05:00 PM     SCR - RIPs deadline to view and take action on the ACL data requests for Dec
    05:00 PM     SCR - Strike Price Management Period for Dec Closes
Friday Nov 14, 2025
    05:00 PM     EXTERNAL TRANSACTIONS - Deadline to submit MIS transaction IDs for Import Rights, Exports, and UDRs
    05:00 PM     TRUE UP - Deadline for TOs to provide final true-up load shift (actual data) for LSE activity 3 months prior
Monday Nov 17, 2025
    05:00 PM     IMPORT RIGHTS - External Bilaterals confirmed for MIS transactions IDs received
Tuesday Nov 18, 2025
    05:00 PM     CERTIFICATION - Deadline for Certification for LSEs and Suppliers for Dec
    05:30 PM     MITIGATION - Default Reference Price
Wednesday Nov 19, 2025
    08:00 AM     SCR - Enrollment Period for auction month of Jan Opens
    08:00 AM     SCR - New Aggregation ID Request Period for Jan Opens
    05:00 PM     LOAD SHIFT - Deadline for TOs to provide daily load shift (customer switching) for Nov
Thursday Nov 20, 2025
    08:00 AM     SPOT MARKET AUCTION - Offer period opens for Dec Spot Market Auction
    05:00 PM     GADS - Deadline for Suppliers to submit GADS data for Oct activity
    05:00 PM     IMPORT RIGHTS - Allocated Import Rights w/o MIS transaction IDs entered into Spot Mkt Auction @ $0.00
Friday Nov 21, 2025
    05:00 PM     SPOT MARKET AUCTION - Offer period closes for Dec Spot Market Auction
Tuesday Nov 25, 2025
    05:00 PM     EXTERNAL TRANSACTIONS - Deadline to submit MIS transaction IDs for ECRs & External Spot awards
    05:00 PM     SCR/EDRP - Deadline to update DRIS contacts to be used for event/test notifications for Dec
    05:00 PM     SPOT MARKET AUCTION - ISO posts results of Dec Spot Market Auction
Wednesday Nov 26, 2025
    08:00 AM     SCR - MPs can begin to import Incremental ACL Verification data from Summer 2025
    08:00 AM     SCR - MPs can begin to import Provisional ACL Verification data from Summer 2025
    08:00 AM     SCR - MPs can view and export SCR Load Zone Peak Hours from Summer 2025
    08:00 AM     SCR - RIPs may begin to report resources with partial PTID Sales for Dec in DRIS
    08:00 AM     SCR - TOs can begin to import Add-back kW values from Summer 2025
    05:00 PM     DMNC - Deadline to submit DMNC data for New Generators to ensure can be used for Jan
Thursday Nov 27, 2025
    12:00 AM     HOLIDAY - NYISO CLOSED
Friday Nov 28, 2025
    12:00 AM     HOLIDAY - NYISO CLOSED
Sunday Nov 30, 2025
    05:00 PM     IMPORT RIGHTS - Deadline for returns for Jan obligation if ISO announced fully allocated prior to that Certification Period opening
    05:00 PM     NYISO posts the annual update ICAP Demand Curve values
    11:59 PM     AGG ENROLLMENT - Enrollment Period for Jan Closes
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