diff --git a/README.md b/README.md
index 6f76c6e..6e7e4b6 100644
--- a/README.md
+++ b/README.md
@@ -54,13 +54,15 @@ An interactive web app that visualizes the **CosmoChron Binary Epoch (CoBiE)** t
 
 ```
 ├── index.html       # Main HTML markup
-├── analog.html     # Analog clock interface
 ├── clock.js        # Clock logic
-
-├── style.css        # Separated styles
-├── script.js        # JavaScript logic
-├── README.md        # This documentation
-└── assets/          # (Optional) images or external CSS/JS
+├── cobie.js        # CoBiE time system utilities
+├── utils.js        # Generic helper functions
+├── animate.js      # Shared animations
+├── events.js       # Sample calendar events
+├── style.css       # Separated styles
+├── script.js       # Page interactions
+├── README.md       # This documentation
+└── test/           # Unit tests
 ```
 
 ## macOS Widget
diff --git a/animate.js b/animate.js
new file mode 100644
index 0000000..316088a
--- /dev/null
+++ b/animate.js
@@ -0,0 +1,83 @@
+(function(){
+  const lastAngles = {
+    handXeno: 0,
+    handQuantic: 0,
+    handChronon: 0,
+    handEonstrip: 0,
+    handMegasequence: 0
+  };
+
+  function rotateHand(id, angle) {
+    const el = document.getElementById(id);
+    if (!el) return;
+    const prev = lastAngles[id];
+
+    if (angle < prev) {
+      const target = angle + 360;
+      const handle = () => {
+        el.removeEventListener('transitionend', handle);
+        el.style.transition = 'none';
+        el.style.transform = `translateX(-50%) translateZ(0) rotate(${angle}deg)`;
+        void el.offsetWidth;
+        el.style.transition = '';
+      };
+      el.addEventListener('transitionend', handle, { once: true });
+      el.style.transform = `translateX(-50%) translateZ(0) rotate(${target}deg)`;
+    } else {
+      el.style.transform = `translateX(-50%) translateZ(0) rotate(${angle}deg)`;
+    }
+    lastAngles[id] = angle;
+  }
+
+  function animateSwipe(direction, onDone) {
+    const grid = document.getElementById('eonstripGrid');
+    if (!grid) { onDone(); return; }
+
+    grid.style.transition = 'none';
+    grid.style.transform = 'translateX(0)';
+    void grid.offsetWidth;
+
+    grid.style.transition = 'transform 0.3s ease';
+    grid.style.transform = `translateX(${direction > 0 ? '-100%' : '100%'})`;
+
+    function afterOut() {
+      grid.removeEventListener('transitionend', afterOut);
+      grid.style.transition = 'none';
+      grid.style.transform = `translateX(${direction > 0 ? '100%' : '-100%'})`;
+      onDone();
+      void grid.offsetWidth;
+      grid.style.transition = 'transform 0.3s ease';
+      grid.style.transform = 'translateX(0)';
+    }
+    grid.addEventListener('transitionend', afterOut);
+  }
+
+  function animateDetailSwipe(direction, onDone) {
+    const tl = document.getElementById('detailTimeline');
+    if (!tl) { onDone(); return; }
+
+    tl.style.transition = 'none';
+    tl.style.transform = 'translateX(0)';
+    void tl.offsetWidth;
+
+    tl.style.transition = 'transform 0.3s ease';
+    tl.style.transform = `translateX(${direction > 0 ? '-100%' : '100%'})`;
+
+    function afterOut() {
+      tl.removeEventListener('transitionend', afterOut);
+      tl.style.transition = 'none';
+      tl.style.transform = `translateX(${direction > 0 ? '100%' : '-100%'})`;
+      onDone();
+      void tl.offsetWidth;
+      tl.style.transition = 'transform 0.3s ease';
+      tl.style.transform = 'translateX(0)';
+    }
+    tl.addEventListener('transitionend', afterOut);
+  }
+
+  window.Animate = {
+    rotateHand,
+    animateSwipe,
+    animateDetailSwipe
+  };
+})();
diff --git a/clock.js b/clock.js
index 163ac76..3aa0946 100644
--- a/clock.js
+++ b/clock.js
@@ -114,39 +114,6 @@
     });
   }
 
-  const lastAngles = {
-    handXeno: 0,
-    handQuantic: 0,
-    handChronon: 0,
-    handEonstrip: 0,
-    handMegasequence: 0
-  };
-
-  function rotateHand(id, angle) {
-    const el = document.getElementById(id);
-    if (!el) return;
-    const prev = lastAngles[id];
-
-    if (angle < prev) {
-      // When wrapping around (e.g. 15 → 0), animate to one full turn
-      // and then snap back to the new angle to avoid a jump.
-      const target = angle + 360;
-      const handle = () => {
-        el.removeEventListener('transitionend', handle);
-        // Snap back without animation
-        el.style.transition = 'none';
-        el.style.transform = `translateX(-50%) translateZ(0) rotate(${angle}deg)`;
-        void el.offsetWidth;
-        el.style.transition = '';
-      };
-      el.addEventListener('transitionend', handle, { once: true });
-      el.style.transform = `translateX(-50%) translateZ(0) rotate(${target}deg)`;
-    } else {
-      el.style.transform = `translateX(-50%) translateZ(0) rotate(${angle}deg)`;
-    }
-
-    lastAngles[id] = angle;
-  }
 
   function renderClock(cob) {
     // Use fractional progress within each unit so angles stay small
@@ -155,11 +122,11 @@
     const cf = (cob % COBIE_UNITS.eonstrip) / COBIE_UNITS.eonstrip;
     const ef = (cob % COBIE_UNITS.megasequence) / COBIE_UNITS.megasequence;
     const mf = (cob % COBIE_UNITS.cosmocycle) / COBIE_UNITS.cosmocycle;
-    rotateHand('handXeno', xf * 360);
-    rotateHand('handQuantic', qf * 360);
-    rotateHand('handChronon', cf * 360);
-    rotateHand('handEonstrip', ef * 360);
-    rotateHand('handMegasequence', mf * 360);
+    Animate.rotateHand('handXeno', xf * 360);
+    Animate.rotateHand('handQuantic', qf * 360);
+    Animate.rotateHand('handChronon', cf * 360);
+    Animate.rotateHand('handEonstrip', ef * 360);
+    Animate.rotateHand('handMegasequence', mf * 360);
   }
 
   function updateClock() {
diff --git a/cobie.js b/cobie.js
index 37fceef..7fb19f2 100644
--- a/cobie.js
+++ b/cobie.js
@@ -19,6 +19,20 @@ const COBIE_UNITS = {
     astralmillennia: 0x1000000000000000
 };
 
+const EONSTRIP_NAMES = [
+    'Solprime', 'Lunex', 'Terros', 'Aquarion',
+    'Ventaso', 'Ignisar', 'Crystalos', 'Floraen',
+    'Faunor', 'Nebulus', 'Astraeus', 'Umbranox',
+    'Electros', 'Chronar', 'Radiantae', 'Etherion'
+];
+
+const MEGASEQUENCE_NAMES = [
+    'Azurean Tide', 'Sable Gleam', 'Verdanth Starfall', 'Crimson Dusk',
+    'Cobalt Frost', 'Amber Blaze', 'Viridian Bloom', 'Argent Veil',
+    'Helian Rise', 'Nocturne Shade', 'Celestine Aura', 'Pyralis Light',
+    'Zephyrine Whisper', 'Lustran Bounty', 'Umbral Echo', 'Mythran Epoch'
+];
+
 function floorDiv(a, b) {
     return Math.trunc(a / b);
 }
@@ -172,7 +186,9 @@ const Cobie = {
     toCobiets,
     fromCobiets,
     formatCobieTimestamp,
-    breakdownNonNeg
+    breakdownNonNeg,
+    EONSTRIP_NAMES,
+    MEGASEQUENCE_NAMES
 };
 
 if (typeof module !== 'undefined' && module.exports) {
diff --git a/index.html b/index.html
index af18f18..672005b 100644
--- a/index.html
+++ b/index.html
@@ -167,6 +167,8 @@
     </div>
 
     <script src="cobie.js"></script>
+    <script src="utils.js"></script>
+    <script src="animate.js"></script>
     <script src="events.js"></script>
     <script src="script.js"></script>
     <script src="clock.js"></script>
diff --git a/script.js b/script.js
index dcc2ef7..6460678 100644
--- a/script.js
+++ b/script.js
@@ -20,19 +20,7 @@ const {
   breakdownNonNeg
 } = window.Cobie;
 
-const EONSTRIP_NAMES = [
-    'Solprime', 'Lunex', 'Terros', 'Aquarion',
-    'Ventaso', 'Ignisar', 'Crystalos', 'Floraen',
-    'Faunor', 'Nebulus', 'Astraeus', 'Umbranox',
-    'Electros', 'Chronar', 'Radiantae', 'Etherion'
-];
-
-const MEGASEQUENCE_NAMES = [
-    'Azurean Tide', 'Sable Gleam', 'Verdanth Starfall', 'Crimson Dusk',
-    'Cobalt Frost', 'Amber Blaze', 'Viridian Bloom', 'Argent Veil',
-    'Helian Rise', 'Nocturne Shade', 'Celestine Aura', 'Pyralis Light',
-    'Zephyrine Whisper', 'Lustran Bounty', 'Umbral Echo', 'Mythran Epoch'
-];
+const { EONSTRIP_NAMES, MEGASEQUENCE_NAMES } = window.Cobie;
 
 let currentOffset = 0;
 let currentTimezone = 'UTC';
@@ -44,34 +32,14 @@ let updateInterval;
 let lastRenderedEonstrip = null;
 let currentDetailCob = null;
 
-// ── Utility color helpers ────────────────────────────────────────────────
-function parseColor(hex) {
-    if (!hex) return [255, 255, 255];
-    let c = hex.replace('#', '');
-    if (c.length === 3) c = c.split('').map(x => x + x).join('');
-    const num = parseInt(c, 16);
-    return [(num >> 16) & 255, (num >> 8) & 255, num & 255];
-}
-
-const toHex = v => v.toString(16).padStart(2, '0');
-
-const hexToRgba = (hex, a = 1) => {
-    const [r, g, b] = parseColor(hex);
-    return `rgba(${r},${g},${b},${a})`;
-};
-
-const getContrastColor = hex => {
-    const [r, g, b] = parseColor(hex);
-    const yiq = (r * 299 + g * 587 + b * 114) / 1000;
-    return yiq >= 128 ? '#000' : '#fff';
-};
-
-const lightenColor = (hex, p) => {
-    const [r, g, b] = parseColor(hex).map(v =>
-        Math.min(255, Math.round(v + (255 - v) * p))
-    );
-    return '#' + [r, g, b].map(toHex).join('');
-};
+// ── Utility color helpers (in utils.js) ───────────────────────────────────
+const {
+    parseColor,
+    hexToRgba,
+    getContrastColor,
+    lightenColor,
+    getHumanDiff
+} = window.Utils;
 
 const dateOptions = (long = true) => ({
     timeZone: currentTimezone === 'TAI' ? 'UTC' : currentTimezone,
@@ -130,71 +98,7 @@ function formatSafeDate(rawDate, cobSeconds, intlOptions) {
 
 // parseCobiets, floorDiv and other CoBiE helpers are provided by cobie.js
 
-function getHumanDiff(d1, d2) {
-  // make sure start ≤ end
-  let start = d1 < d2 ? d1 : d2;
-  let end   = d1 < d2 ? d2 : d1;
 
-  // 1) year/month/day difference
-  let years  = end.getUTCFullYear()  - start.getUTCFullYear();
-  let months = end.getUTCMonth()     - start.getUTCMonth();
-  let days   = end.getUTCDate()      - start.getUTCDate();
-
-  // if day roll-under, borrow from month
-  if (days < 0) {
-    months--;
-    // days in the month *before* `end`’s month:
-    let prevMonthDays = new Date(Date.UTC(
-      end.getUTCFullYear(),
-      end.getUTCMonth(), 0
-    )).getUTCDate();
-    days += prevMonthDays;
-  }
-  // if month roll-under, borrow from year
-  if (months < 0) {
-    years--;
-    months += 12;
-  }
-
-  // 2) now handle hours/min/sec by “aligning” a Date at start+Y/M/D
-  let aligned = new Date(Date.UTC(
-    start.getUTCFullYear() + years,
-    start.getUTCMonth()     + months,
-    start.getUTCDate()      + days,
-    start.getUTCHours(),
-    start.getUTCMinutes(),
-    start.getUTCSeconds()
-  ));
-  let diffMs = end.getTime() - aligned.getTime();
-
-  // if we overshot (negative), borrow one day
-  if (diffMs < 0) {
-    // borrow 24 h
-    diffMs += 24 * 3600e3;
-    if (days > 0) {
-      days--;
-    } else {
-      // days was zero, so borrow a month
-      months--;
-      if (months < 0) {
-        years--;
-        months += 12;
-      }
-      // set days to length of the previous month of `end`
-      days = new Date(Date.UTC(
-        end.getUTCFullYear(),
-        end.getUTCMonth(), 0
-      )).getUTCDate();
-    }
-  }
-
-  // 3) extract h/m/s
-  let hours   = Math.floor(diffMs / 3600e3); diffMs -= hours * 3600e3;
-  let minutes = Math.floor(diffMs /   60e3); diffMs -= minutes *   60e3;
-  let seconds = Math.floor(diffMs /    1e3);
-
-return { years, months, days, hours, minutes, seconds };
-}
 
 // ── Event utilities ──────────────────────────────────────────────────────
 const normalizeEvent = ev => {
@@ -866,14 +770,14 @@ function updateDetailCurrentTime() {
 
 function detailPrev() {
     if (currentDetailCob === null) return;
-    animateDetailSwipe(-1, () => {
+    Animate.animateDetailSwipe(-1, () => {
         showEonstripDetail(currentDetailCob - COBIE_UNITS.eonstrip);
     });
 }
 
 function detailNext() {
     if (currentDetailCob === null) return;
-    animateDetailSwipe(1, () => {
+    Animate.animateDetailSwipe(1, () => {
         showEonstripDetail(currentDetailCob + COBIE_UNITS.eonstrip);
     });
 }
@@ -921,65 +825,12 @@ function navigatePeriod(evt, direction) {
         exitDetailView();
     }
 
-    animateSwipe(direction, () => {
+    Animate.animateSwipe(direction, () => {
         currentOffset += direction * step;
         updateCalendar();
     });
 }
 
-function animateSwipe(direction, onDone) {
-    const grid = document.getElementById('eonstripGrid');
-    if (!grid) { onDone(); return; }
-
-    // Ensure a clean starting state when the grid was previously hidden
-    grid.style.transition = 'none';
-    grid.style.transform = 'translateX(0)';
-    void grid.offsetWidth; // force reflow
-
-    // slide out
-    grid.style.transition = 'transform 0.3s ease';
-    grid.style.transform = `translateX(${direction > 0 ? '-100%' : '100%'})`;
-
-    function afterOut() {
-        grid.removeEventListener('transitionend', afterOut);
-        // prepare new position off-screen on the other side
-        grid.style.transition = 'none';
-        grid.style.transform = `translateX(${direction > 0 ? '100%' : '-100%'})`;
-        onDone();
-        // force reflow to apply position instantly
-        void grid.offsetWidth;
-        // slide in with transition
-        grid.style.transition = 'transform 0.3s ease';
-        grid.style.transform = 'translateX(0)';
-    }
-
-    grid.addEventListener('transitionend', afterOut);
-}
-
-function animateDetailSwipe(direction, onDone) {
-    const tl = document.getElementById('detailTimeline');
-    if (!tl) { onDone(); return; }
-
-    tl.style.transition = 'none';
-    tl.style.transform = 'translateX(0)';
-    void tl.offsetWidth;
-
-    tl.style.transition = 'transform 0.3s ease';
-    tl.style.transform = `translateX(${direction > 0 ? '-100%' : '100%'})`;
-
-    function afterOut() {
-        tl.removeEventListener('transitionend', afterOut);
-        tl.style.transition = 'none';
-        tl.style.transform = `translateX(${direction > 0 ? '100%' : '-100%'})`;
-        onDone();
-        void tl.offsetWidth;
-        tl.style.transition = 'transform 0.3s ease';
-        tl.style.transform = 'translateX(0)';
-    }
-
-    tl.addEventListener('transitionend', afterOut);
-}
-
 function goToNow() {
     manualMode = false;
     manualCobiets = 0;
diff --git a/utils.js b/utils.js
new file mode 100644
index 0000000..a4b070c
--- /dev/null
+++ b/utils.js
@@ -0,0 +1,92 @@
+(function(){
+  function parseColor(hex) {
+    if (!hex) return [255, 255, 255];
+    let c = hex.replace('#', '');
+    if (c.length === 3) c = c.split('').map(x => x + x).join('');
+    const num = parseInt(c, 16);
+    return [(num >> 16) & 255, (num >> 8) & 255, num & 255];
+  }
+
+  const toHex = v => v.toString(16).padStart(2, '0');
+
+  function hexToRgba(hex, a = 1) {
+    const [r, g, b] = parseColor(hex);
+    return `rgba(${r},${g},${b},${a})`;
+  }
+
+  function getContrastColor(hex) {
+    const [r, g, b] = parseColor(hex);
+    const yiq = (r * 299 + g * 587 + b * 114) / 1000;
+    return yiq >= 128 ? '#000' : '#fff';
+  }
+
+  function lightenColor(hex, p) {
+    const [r, g, b] = parseColor(hex).map(v =>
+      Math.min(255, Math.round(v + (255 - v) * p))
+    );
+    return '#' + [r, g, b].map(toHex).join('');
+  }
+
+  function getHumanDiff(d1, d2) {
+    let start = d1 < d2 ? d1 : d2;
+    let end   = d1 < d2 ? d2 : d1;
+
+    let years  = end.getUTCFullYear()  - start.getUTCFullYear();
+    let months = end.getUTCMonth()     - start.getUTCMonth();
+    let days   = end.getUTCDate()      - start.getUTCDate();
+
+    if (days < 0) {
+      months--;
+      let prevMonthDays = new Date(Date.UTC(
+        end.getUTCFullYear(),
+        end.getUTCMonth(), 0
+      )).getUTCDate();
+      days += prevMonthDays;
+    }
+    if (months < 0) {
+      years--;
+      months += 12;
+    }
+
+    let aligned = new Date(Date.UTC(
+      start.getUTCFullYear() + years,
+      start.getUTCMonth()     + months,
+      start.getUTCDate()      + days,
+      start.getUTCHours(),
+      start.getUTCMinutes(),
+      start.getUTCSeconds()
+    ));
+    let diffMs = end.getTime() - aligned.getTime();
+
+    if (diffMs < 0) {
+      diffMs += 24 * 3600e3;
+      if (days > 0) {
+        days--;
+      } else {
+        months--;
+        if (months < 0) {
+          years--;
+          months += 12;
+        }
+        days = new Date(Date.UTC(
+          end.getUTCFullYear(),
+          end.getUTCMonth(), 0
+        )).getUTCDate();
+      }
+    }
+
+    let hours   = Math.floor(diffMs / 3600e3); diffMs -= hours * 3600e3;
+    let minutes = Math.floor(diffMs /   60e3); diffMs -= minutes *   60e3;
+    let seconds = Math.floor(diffMs /    1e3);
+
+    return { years, months, days, hours, minutes, seconds };
+  }
+
+  window.Utils = {
+    parseColor,
+    hexToRgba,
+    getContrastColor,
+    lightenColor,
+    getHumanDiff
+  };
+})();