NOTICE DATE: February 16, 2022

NOTICE TYPE: M-B021621-01Operations

SHORT DESCRIPTION: ERCOT MOTE will be open for DST testing

INTENDED AUDIENCE: QSE operations personnel

DAYS AFFECTED: February 21, 2022 through February 25, 2022

LONG DESCRIPTION: The ERCOT Market Operations Test Environment (MOTE) will be available for Market Participant Daylight Saving Time (DST) testing as listed in the table below.  Note that there is one period for testing this year.  The testing period will be from Monday through Friday and will follow the simulated times shown in the table.


Simulated time

MOTE system

2/21/22 2:00 PM

3/11/22 2:00 AM

MOTE Servers Normal Time change to DST Time

2/21/22 5:00 PM

3/11/22 5:00 AM

Start testing QSE submissions for next 5 days including Short Day 03/13/2022

2/21/22 10:00 PM

3/11/22 10:00 AM

DAM close for Operating Day 03/12/2022

2/22/22 10:00 PM

3/12/22 10:00 AM

DAM close for Operating Day  03/13/2022 (Short DST Day)

2/23/22 1:00 PM

3/13/22 1:00 AM

CST Time

2/23/22 2:00 PM

3/13/22 3:00 AM

DST Transition Time

2/23/22 9:00 PM

3/13/22 10:00 AM

DAM close for Operating Day 03/14/2022

2/24/22 9:00 PM

3/14/22 10:00 AM

DAM close for Operating Day 03/15/2022

2/25/22 02:00 PM

3/15/22 03:00 AM

Close of Test and MOTE Servers DST Time Change to Normal Time


ADDITIONAL INFORMATION: For information regarding submissions, including DST requirements, please refer to the latest version of the EIP External Interface Specifications document for use of the External Web Services (EWS) found in the Wholesale section of the XSDs webpage. The most recent External Web Services XSD may also be found in the same location.

For MOTE testing, the URL for XML submissions is:

The URL for UI submissions is:

The following are examples of how the Short DST Day March 13, 2022 will be labeled:





CONTACT: If you have any questions, please contact your ERCOT Account Manager. You may also call the general ERCOT Client Services phone number at (512) 248-3900 or contact ERCOT Client Services via email at [log in to unmask].

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