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Establish UTC as the system-wide timestamp convention

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All timestamps must use UTC for storage, transmission, and processing.
Local time conversion is a Central UI display concern only. Documented
in Commons (REQ-COM-1) and HighLevelReqs (Section 13.1).
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Joseph Doherty
2026-03-16 09:30:08 -04:00
parent 3a833f5dea
commit 6d33e93610
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HighLevelReqs.md
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@@ -459,6 +459,13 @@ Sites log operational events locally, including:
### 12.3 Central Access
- The central UI can **query site event logs remotely**, following the same pattern as parked message management — central requests data from the site over Akka.NET remoting.
## 13. General Conventions
### 13.1 Timestamps
- All timestamps throughout the system are stored, transmitted, and processed in **UTC**.
- This applies to: attribute value timestamps, alarm state change timestamps, audit log entries, event log entries, deployment records, health reports, store-and-forward message timestamps, and all inter-node messages.
- Local time conversion for display is a **Central UI concern only** — no other component performs timezone conversion.
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*All initial high-level requirements have been captured. This document will continue to be updated as the design evolves.*