Notice
Oct. 27, 2023
REQUESTED ACTION
Information Only
CATEGORIES
Information Technology
Markets
Operations
Daylight Saving Time transition on 11/5/23
MESSAGE

Sunday, Nov. 5, 2023 2:00 a.m. is the Daylight Saving Time (DST) transition from Daylight Time (DT) to Standard Time (ST). The California ISO is ready to monitor this event and ensure users experience a smooth transition.

 

Please review the Daylight Saving Time Long Day Information document for information on how the transition will occur in the ISO systems.

 

Market Timelines for the Long Day Sunday, Nov. 5, 2023

 

Market Closure

Market Impacted - Day-Ahead Market (DAM), Real-Time Market (RTM)

11/04/2023 1000 PDT

DAM (Bids, Base Schedules, RC Base Schedules) for Trading Day 11/05/2023

11/04/2023 1100 PDT

DAM (Trades) for Trading Day 11/05/2023

11/04/2023 2345 PDT

RTM (Bids, Base Schedules, RC Base Schedules) for Hour Ending 0200

11/04/2023 0015 PDT

RTM (Trades) for Hour Ending 0200

11/05/2023 0045 PDT

RTM (Bids, Base Schedules, RC Base Schedules) for Hour Ending 0200* (Second Hour Ending 0200)

11/05/2023 0115 PDT

RTM (Trades) for Hour Ending 0200* (Second Hour Ending 0200)

11/05/2023 0145 PDT

RTM (Bids, Base Schedules, RC Base Schedules) for Hour Ending 0300

11/05/2023 0115 PST

RTM (Trades) for Hour Ending 0300

11/05/2023 0145 PST

RTM (Bids, Base Schedules, RC Base Schedules) for Hour Ending 0400

11/05/2023 0215 PST

RTM (Trades) for Hour Ending 0400

CONTACT INFORMATION

Please contact the ISO Service Desk at (916) 351-2309 or (888) 889-0450, or the RC West Service Desk (for RC West participants only) at (916) 538-5722 or (833) 888-9378 with any questions.

California Independent System Operator | P.O. Box 639014 | Folsom, CA 95630 | United States
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