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FAQs on fundamental data and inside information – Question II.3.3.4

Can you please confirm how the gasDayStart and gasDayEnd data fields should be reported for an entity reporting on UK activities in the Storage Participation Activity Report? The Agency’s guidance for the fields says: The start of the gas day in UTC ISO8601 standard with an example YYYY-MM-DD 06:00 and The end of the gas day in UTC ISO8601 standard with an example YYYY-MM-DD 06:00 The TSO places gas for Operating Margins at UK storage facilities. For the avoidance of doubt can you please provide clear instructions/examples on how as an entity reporting on UK activities should reference the start of the gas day and end of the gas day (including clock change). Following this standard we believe the referencing for gas day starting 21/04/16 for example should be: gasDayStart 2016-04-21 04:00:00Z gasDayEnd 2016-04-22 3:59:59Z


Answer:

If the time zone for the reported facility is in the UK and the gas day starts at 5:00 am local time then the correct start and end time is the following:

During Summer Time Or
gasDayStart 2016-04-21 04:00:00Z 2016-04-21 05:00:00+01:00
gasDayEnd 2016-04-22 04:00:00Z 2016-04-22 05:00:00+01:00
During winter time Or
gasDayStart 2016-11-21 05:00:00Z 2016-11-21 05:00:00+00:00
gasDayEnd 2016-11-22 05:00:00Z 2016-11-22 05:00:00+00:00

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