ISO Logo
 
Notice
October 27, 2021

REQUESTED ACTION

Information Only

CATEGORIES

Information Technology

Markets

Operations
California ISO to Transition to Standard Time on 11/7/21

MESSAGE

Sunday, Nov. 7, 2021 2:00 a.m. is the Daylight Saving Time transition from DT (Daylight Time) to ST (Standard Time). 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. 7, 2021

 

Market Closure

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

11/6/2021 1000 PDT

DAM (Bids, Base Schedules, RC Base Schedules) for Trading Day 11/7/2021

11/6/2021 1100 PDT

DAM (Trades) for Trading Day 11/7/2021

11/6/2021 2345 PDT

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

11/6/2021 0015 PDT

RTM (Trades) for Hour Ending 0200

11/7/2021 0045 PDT

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

11/7/2021 0115 PDT

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

11/7/2021 0145 PDT

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

11/7/2021 0115 PST

RTM (Trades) for Hour Ending 0300

11/7/2021 0145 PST

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

11/7/2021 0215 PST

RTM (Trades) for Hour Ending 0400


CONTACT INFORMATION

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.

 

Engage with us!
isoball twitterball RSSball Facebookball YouTube
Daily Briefing
Sign up
for
Daily Briefing
ISO Today
Download
ISO Today
Flex Alerts
Sign up
for
Flex Alerts

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