DSB’s operating hours:
Sunday 08:00 AM to Saturday 20:00 PM UTC

Production Environment:
Up to and including Saturday 19th January 2019: Sunday 12:00 PM UTC to Saturday 12:00 PM UTC
Effective Sunday 20th January 2019: Sunday 08:00 AM to Saturday 20:00 PM UTC
The DSB will be operational on public holidays unless users are notified otherwise.

UAT Environment:
The UAT environment’s operating hours mirrors the Production environment, however, an extended weekend maintenance may be required for releases accompanied with a notification to be sent to users.
For FIX API users, a mid-week UAT maintenance occurs every Wednesday whenever required with a window of: Wednesday 2:00 AM UTC to Wednesday 7:00 AM UTC