diff --git a/scripts/qa-navara-bloom.mjs b/scripts/qa-navara-bloom.mjs
index 41a7dd1c7..e6818ace1 100644
--- a/scripts/qa-navara-bloom.mjs
+++ b/scripts/qa-navara-bloom.mjs
@@ -21,6 +21,7 @@ import {
   diff,
   freeze,
   pickStyle,
+  pinDaytime,
   saveCapture,
   stats,
   visualPageUrl,
@@ -58,6 +59,9 @@ await strict.run(
     const page = await browser.newPage();
     const errors = [];
     page.on('pageerror', (error) => errors.push(error.message));
+    // The same sun on every run: the frame's brightness decides what blooms
+    // and what each style's signature reads.
+    await pinDaytime(page);
     await page.evaluateOnNewDocument(() => {
       localStorage.setItem('gev:first-run-mission:v1', 'suppressed');
     });
diff --git a/scripts/qa-navara-visual-styles.mjs b/scripts/qa-navara-visual-styles.mjs
index de19400e1..213fd71fd 100644
--- a/scripts/qa-navara-visual-styles.mjs
+++ b/scripts/qa-navara-visual-styles.mjs
@@ -24,6 +24,7 @@ import {
   freeze,
   histogramShift,
   pickStyle,
+  pinDaytime,
   saveCapture,
   stats,
   visualPageUrl,
@@ -50,6 +51,9 @@ await strict.run(
     const page = await browser.newPage();
     const errors = [];
     page.on('pageerror', (error) => errors.push(error.message));
+    // The same sun on every run: the frame's brightness decides what blooms
+    // and what each style's signature reads.
+    await pinDaytime(page);
     await page.evaluateOnNewDocument(() => {
       localStorage.setItem('gev:first-run-mission:v1', 'suppressed');
     });
diff --git a/scripts/qa/navaraVisual.mjs b/scripts/qa/navaraVisual.mjs
index 6da59e8b9..709d15bc5 100644
--- a/scripts/qa/navaraVisual.mjs
+++ b/scripts/qa/navaraVisual.mjs
@@ -11,6 +11,29 @@ import sharp from 'sharp';
 export const STILL_VIEW =
   'v=2&lat=30.2672&lon=-97.7431&alt=20000&heading=0&pitch=-70&map=osm&l=';
 
+/**
+ * Before the app loads: the page's Date runs from `utc` on, so the look's
+ * sun (and with it the frame's brightness, which the bloom threshold and
+ * the styles' signatures read) does not follow the time of day the
+ * scenario happens to run at. Default: Austin early afternoon.
+ */
+export function pinDaytime(page, utc = '2026-11-03T18:30:00Z') {
+  return page.evaluateOnNewDocument((utc) => {
+    const offset = Date.parse(utc) - Date.now();
+    const RealDate = Date;
+    class ShiftedDate extends RealDate {
+      constructor(...args) {
+        if (args.length === 0) super(RealDate.now() + offset);
+        else super(...args);
+      }
+      static now() {
+        return RealDate.now() + offset;
+      }
+    }
+    globalThis.Date = ShiftedDate;
+  }, utc);
+}
+
 /** The keyless page on `engine` with the still view (and `extra` hash). */
 export const visualPageUrl = (origin, engine, extra = '', view = STILL_VIEW) =>
   `${origin}/?engine=${engine}&welcome=0&look=cinematic#${view}${extra}`;