https://iesoqa-public.sharepoint.com/Pages/News/Day_1-34_Advisory_Notices_Summary.aspx IESO Day 1-34 System Advisory Messages Sat, 30 May 2026 00:00 EST http://www.ieso.ca/SiteAssets/ieso-logo.gif http://www.ieso.ca en-us Copyright 2016 http://www.ieso.ca/sector-participants/rss-feeds/day-1-to-34-advisory-notices-summary/advisory-notice?cid=B8DAF6E5-C2B6-434F-BD53-C90FE57CD1D8&rid=10625842 Generation Biasing Fri, 29 May 2026 10:40 EST 10625842 255069 1 Generation Biasing Generation biasing may be required for planned switching on L5H/L5A. Sun, 31 May 2026 12:00 EST Sun, 31 May 2026 12:15 EST Fri, 29 May 2026 10:40 EST Fri, 29 May 2026 10:40 EST Action http://www.ieso.ca/sector-participants/rss-feeds/day-1-to-34-advisory-notices-summary/advisory-notice?cid=B8DAF6E5-C2B6-434F-BD53-C90FE57CD1D8&rid=10436537 Capacity Auction Testing Week Thu, 14 May 2026 07:36 EST 10436537 254650 1 Capacity Auction Testing Week The Capacity Auction testing window (the “testing week”) for the summer 2026 obligation period has been scheduled from June 1st, 2026 to June 5th, 2026. Capacity Auction resources must self-schedule a capacity auction capacity test within this testing week and during the availability window. Please contact IESO Customer Relations if there are any questions. Mon, 01 Jun 2026 12:00 EST Fri, 05 Jun 2026 21:00 EST Thu, 14 May 2026 07:36 EST Thu, 14 May 2026 07:36 EST Alert