According to the MOP Version 3 of 30 September, you require the market participants in the data fields 11 “schedule_Time_Period.timeInterval start” and 12 “schedule_time_Period.timeInternal end” to report the beginning and end of their nomination schedule period in UTC time standard.
But regarding the daylight savings time issue: Can electricity TSOs report their nomination schedule period during the summer as <date1-1>t:22:00Z to <date2-1>T22:00Z and during the winter <date1-2>T23:00Z to <date2-1>T23:00Z?
On the basis of the IEC ENTSO-E standards, which deal natively with daylight savings, 23 time periods should be reported during the daylight savings time and 25 time periods in winter time. Same applies for nomination schedules: 23 time periods during the daylight savings time and 25 time periods in winter time.
Last update: 31/08/2016