Daylight saving time 21st October – member test information

In preparation for the upcoming clock change on Sunday 31st of October 2021, IBEX will be offering a test simulation in the electronic trading system of the Day-Ahead market segment (ETS-DA) in the member test environment on Thursday 21st of October 2021.

The transition from summertime to wintertime takes place by setting the clock back one hour at 03:00 CET on Sunday 31st of October. Therefore Sunday 31st will have 25 trading hours. We encourage customers to use this test to place orders and check the results to ensure they are familiar with the process.

Test systems
On Thursday 21st of October, we will run day-ahead auction session with delivery day 31st of October. The test environment is open for bids from today until gate closure time (see below). Please 31st of October as a delivery date and select the trading session with a “TEST_” name prefix in the ETS and deliver your bids as usual. In case you upload bids via Excel sheets in ETS-DA, please remember to download the template for 31st of October.

Test deadlines 21st of October:
14:00 CET            Gate closure time
15:30 CET            Publication of results

CASS results will be available in the member test environment the following day.

Test sites and log in
Test site Day-Ahead ETS URL:

Test site Clearing and Settlement URL:

Username and password for member test is required for these systems. If you do not have a test account, please contact by Tuesday 18th of October to set one up.