ISO Logo
 
Notice
March 9, 2021

REQUESTED ACTION

Information Only

CATEGORIES

Information Technology

Markets

Operations
California ISO to Transition to Daylight Saving Time on 3/14/21

MESSAGE

The California ISO will transition from Pacific Standard Time (PST) to Pacific Daylight Time (PDT) on Sunday, March 14, 2021, at 02:00 a.m.

 

A Daylight Saving Time Short Day Information document is available on the ISO website at http://www.caiso.com/Documents/DaylightSavingTimeShortDayInformation.pdf. The document describes how the transition will occur in its various systems to ensure a smooth transition.

 

Market Timelines for the Short Day Sunday, March 14, 2021.

 

Market Closure

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

3/13/2021 10:00 PST

DAM (Bids, Base Schedules, RC Base Schedules) for Trading Day 3/14/2021

3/13/2021 11:00 PST

DAM (Trades) for Trading Day 3/14/2021

3/13/2021 23:45 PST

RTM (Bids, Base Schedules, RC Base Schedules) for Hour Ending 2:00

3/14/2021 0:15 PST

RTM (Trades) for Hour Ending 2:00

3/14/2021 0:45 PST

RTM (Bids, Base Schedules, RC Base Schedules) for Hour Ending 4:00

3/14/2021 1:15 PST

RTM (Trades) for Hour Ending 4:00

3/14/2021 1:45 PST

RTM (Bids, Base Schedules, RC Base Schedules) for Hour Ending 5:00

3/14/2021 3:15 PDT

RTM (Trades) for Hour Ending 5:00

3/14/2021 3:45 PDT

RTM (Bids, Base Schedules, RC Base Schedules) for Hour Ending 6:00

3/14/2021 4:15 PDT

RTM (Trades) for Hour Ending 6:00

 

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