Sunday, March 12, 2023 2:00 a.m. is the Daylight Saving Time (DST) transition from Standard Time (ST) to Daylight Time (DT). The California ISO is ready to monitor this event and ensure users experience a smooth transition.
Please review the Daylight Saving Time Short Day Information document for information on how the transition will occur in the ISO systems.
Market Timelines for the Short Day Sunday, March 12, 2023
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Market Closure
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Market Impacted - Day-Ahead Market (DAM), Real-Time Market (RTM)
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March 11, 2023
10:00 PST
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DAM (Bids, Base Schedules, RC Base Schedules) for Trading Day March 12, 2023
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March 11, 2023
11:00 PST
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DAM (Trades) for Trading Day March 12, 2023
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March 11, 2023
23:45 PST
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RTM (Bids, Base Schedules, RC Base Schedules) for Hour Ending 2:00
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March 12, 2023
0:15 PST
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RTM (Trades) for Hour Ending 2:00
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March 12, 2023
0:45 PST
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RTM (Bids, Base Schedules, RC Base Schedules) for Hour Ending 4:00
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March 12, 2023
1:15 PST
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RTM (Trades) for Hour Ending 4:00
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March 12, 2023
1:45 PST
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RTM (Bids, Base Schedules, RC Base Schedules) for Hour Ending 5:00
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March 12, 2023
3:15 PDT
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RTM (Trades) for Hour Ending 5:00
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March 12, 2023
3:45 PDT
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RTM (Bids, Base Schedules, RC Base Schedules) for Hour Ending 6:00
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March 12, 2023
4:15 PDT
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RTM (Trades) for Hour Ending 6:00
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