T2S Release 5.0 Status Update No. 1 – Preparation of “T2S Deployment Weekend”


In Announcement D21004 Clearstream Banking AG (CBF) informed customers about the upcoming T2S Release 5.0. The attachments to this Announcement list the T2S Change Requests and Problem tickets that are included in the scope of T2S Release 5.0. The “Indicative timeline for the deployment of T2S Release 5.0” for this weekend (12 to 14 June 2021) were provided in Announcement D21023.

The deployment of the modified software versions that will be implemented with T2S Release 5.0 was confirmed by the Market Infrastructure Board (MIB) on Tuesday, 1 June 2021. Based on the latest documentation provided by the ECB there will be changes in the T2S Operational Day for the business day Monday, 14 June 2021. All changes will be effective upon completion of the end-of-day procedure for Friday, 11 June 2021.

The “Indicative timeline for the deployment of T2S Release 5.0” was updated today to show the latest schedule provided by T2S end of May 2021. Unless otherwise stated, all times are given in Central European Summer Time (CEST).

The table below provides an overview of the important milestones of the “T2S Release 5.0 Deployment Weekend” for which Operational News will be published.

Operational News


Due date / time (CET)


T2S Release Weekend Schedule
Latest status for planning

Monday, 7 June 2021


Completion of CBF End of Day Processing
Friday, 11 June 2021

Friday, 11 June 2021,


T2S - End of processing of incoming messages

Friday, 11 June 2021,


Green Light for
T2S Software Deployment

Friday, 11 June 2021,


Start of Transmission (A2A)
T2S Settlement Messages / Reports

Saturday, 12 June 2021,


Start of Transmission 
Clearstream Settlement Reporting

Sunday, 13 June 2021,


Completion of T2S Real-Time Settlement (RTS) and Start of Maintenance Windows

Sunday, 13 June 2021,