Information on setting Public Holidays in a MAT Environment

Dear Clients,

we would like to inform you of the restrictions and changes planned for the MAT test environment in the coming period due to KELER’s WARP calendar tests.

From September 30, 2026, through October 7, 2026, technical and business test simulations involving master data modifications (order entries and settlements) for certain ISINs will take place in the WARP application.
On Friday, October 2, 2026, the WARP system’s client testing will be suspended.
October 5–7, 2026, have been designated as KELER non-business days; therefore, there will be no settlement or clearing on those days.
In the event of unsuccessful KELER-side tests, additional KELER non-business days will be scheduled for October 8–9, 2026. We will provide information on the need to use these make-up days on October 2.

Thank you for your understanding!

Best regards,
KELER Ltd.