# Seth Clock Suite - Major Refresh Context

Date: 2026-03-09
Scope: `clock.sethpc.xyz` static app suite

## Highlights

- Astronomy page now shows Seth/Gregorian columns for core metrics.
- Astronomy event list now shows dual dates (Seth + Gregorian) per item.
- Astronomy location controls added:
  - manual lat/lon + label
  - US ZIP lookup
  - browser geolocation helper
  - session persistence (`sessionStorage`) with cookie mirror fallback
- Navigation consistency improved across pages (`/`, `/decimal`, `/convert`, `/seth`, `/calendar`, `/astro`).
- Seth Date reference text corrected for auxiliary day rules and Dec 25/26 mappings.

## Canonical Seth rules reflected

- 10 months x 36 days (0-indexed)
- Leap day is intercalary (outside month grid)
- Auxiliary days are always H0-H4 (5 total)
- Dec 25 -> M9D34, Dec 26 -> M9D35 (both leap and non-leap)

## Operational notes

- Repo path: `/root/bin/clock-site`
- Live deployment path: CT 242 `/opt/clock-site`
- Service: `clock.service`
- Domain: `clock.sethpc.xyz`