diff --git a/frontend/src/App.jsx b/frontend/src/App.jsx
index eaa77c5..9877bbc 100644
--- a/frontend/src/App.jsx
+++ b/frontend/src/App.jsx
@@ -170,7 +170,6 @@ export default function App() {
   const [startDateOverride, setStartDateOverride] = useState('')
   const [failedTests,       setFailedTests]       = useState([])
   const [scheduleData,      setScheduleData]      = useState({})
-  const [previousScheduleData, setPreviousScheduleData] = useState({})
   const [scheduleWindows,   setScheduleWindows]   = useState([])
   const [selectedWindowId,  setSelectedWindowId]  = useState(null)
   const [completionDate,    setCompletionDate]    = useState(null)
@@ -203,54 +202,13 @@ export default function App() {
 
   // Fetch schedule for the given weekStart (Monday)
   const fetchSchedule = useCallback(async (start) => {
-    const key = toKey(start)
-
-    const loadLegacyWeek = async () => {
-      const data = await api.getScheduleWeek(key)
+    try {
+      const data = await api.getScheduleWeek(toKey(start))
       setScheduleData(groupScheduleItems(data.items))
-      setPreviousScheduleData({})
       setScheduleWindows(data.windows ?? [])
       setCompletionDate(data.completion_date ?? null)
-    }
-
-    try {
-      let versionsData = null
-      try {
-        versionsData = await api.getScheduleVersions()
-      } catch (_versionErr) {
-        // Fallback for older backend builds that do not expose /schedule/versions yet.
-        await loadLegacyWeek()
-        return
-      }
-
-      const versions = versionsData.versions ?? []
-
-      const latestVersion = versions[0]?.schedule_version ?? null
-      const previousVersion = versions[1]?.schedule_version ?? null
-
-      if (latestVersion === null) {
-        await loadLegacyWeek()
-        return
-      }
-
-      const latestData = await api.getScheduleWeek(key, latestVersion)
-      setScheduleData(groupScheduleItems(latestData.items))
-      setScheduleWindows(latestData.windows ?? [])
-      setCompletionDate(latestData.completion_date ?? null)
-
-      if (previousVersion !== null) {
-        const previousData = await api.getScheduleWeek(key, previousVersion)
-        setPreviousScheduleData(groupScheduleItems(previousData.items))
-      } else {
-        setPreviousScheduleData({})
-      }
     } catch (e) {
       console.error('Failed to fetch schedule:', e)
-      try {
-        await loadLegacyWeek()
-      } catch (fallbackErr) {
-        console.error('Fallback schedule fetch also failed:', fallbackErr)
-      }
     }
   }, [])
 
@@ -413,7 +371,6 @@ export default function App() {
         <div className="flex-1 min-w-0 flex flex-col">
           <Calendar
             scheduleData={scheduleData}
-            previousScheduleData={previousScheduleData}
             daytimeDateKey={null}
             weekStart={weekStart}
             onWeekChange={setWeekStart}
diff --git a/frontend/src/api.js b/frontend/src/api.js
index cfd24e4..8983519 100644
--- a/frontend/src/api.js
+++ b/frontend/src/api.js
@@ -30,14 +30,7 @@ export const api = {
 
   // Schedule
   compileSchedule: (opts) => request('POST', '/schedule/compile', opts),
-  getScheduleVersions: () => request('GET', '/schedule/versions'),
-  getScheduleWeek: (start, version = null) => {
-    const params = new URLSearchParams({ start })
-    if (version !== null && version !== undefined) {
-      params.set('version', String(version))
-    }
-    return request('GET', `/schedule/week?${params.toString()}`)
-  },
+  getScheduleWeek: (start) => request('GET', `/schedule/week?start=${start}`),
   getRerunTests: () => request('GET', '/tests/rerun'),
 }
 
diff --git a/frontend/src/components/Calendar.jsx b/frontend/src/components/Calendar.jsx
index bc53d4b..5ec8f3b 100644
--- a/frontend/src/components/Calendar.jsx
+++ b/frontend/src/components/Calendar.jsx
@@ -23,14 +23,6 @@ function toDateKey(date) {
   return date.toISOString().slice(0, 10)
 }
 
-function emptyDayShifts() {
-  return { shift1: [], shift2: [], shift3: [] }
-}
-
-function dayHasTests(shifts = {}) {
-  return (shifts.shift1?.length ?? 0) > 0 || (shifts.shift2?.length ?? 0) > 0 || (shifts.shift3?.length ?? 0) > 0
-}
-
 function getMondayOfWeek(date) {
   const d = new Date(date)
   const day = d.getDay()
@@ -59,7 +51,6 @@ function getNextTestWindow() {
 // scheduleData: { "YYYY-MM-DD": { shift1: [...], shift2: [...], shift3: [...] }, ... }
 export default function Calendar({
   scheduleData = {},
-  previousScheduleData = {},
   daytimeDateKey = null,
   weekStart,
   onWeekChange,
@@ -84,34 +75,6 @@ export default function Calendar({
   // Reorder columns: Sun Mon Tue Wed Thu Fri Sat
   // weekStart is Monday, so days[0]=Mon ... days[6]=Sun → put Sunday first
   const orderedDays = [ ...days.slice(0, 7)]
-  const daySourceByKey = useMemo(() => {
-    const out = {}
-    for (const date of orderedDays) {
-      const key = toDateKey(date)
-      const latestDay = scheduleData[key] ?? emptyDayShifts()
-      const previousDay = previousScheduleData[key] ?? emptyDayShifts()
-
-      if (dayHasTests(latestDay)) {
-        out[key] = 'current'
-      } else if (dayHasTests(previousDay)) {
-        out[key] = 'previous'
-      } else {
-        out[key] = 'current'
-      }
-    }
-    return out
-  }, [orderedDays, scheduleData, previousScheduleData])
-  const mergedScheduleData = useMemo(() => {
-    const out = {}
-    for (const date of orderedDays) {
-      const key = toDateKey(date)
-      const source = daySourceByKey[key]
-      out[key] = source === 'previous'
-        ? (previousScheduleData[key] ?? emptyDayShifts())
-        : (scheduleData[key] ?? emptyDayShifts())
-    }
-    return out
-  }, [orderedDays, daySourceByKey, scheduleData, previousScheduleData])
   const shiftMinRows = useMemo(() => {
     const minima = {
       shift2: DEFAULT_SHIFT_MIN_ROWS,
@@ -121,9 +84,9 @@ export default function Calendar({
 
     for (const date of orderedDays) {
       const key = toDateKey(date)
-      const shifts = mergedScheduleData[key] ?? emptyDayShifts()
+      const shifts = scheduleData[key] ?? { shift1: [], shift2: [], shift3: [] }
       const nextKey = toDateKey(addDays(date, 1))
-      const nextDayShift1 = mergedScheduleData[nextKey]?.shift1 ?? []
+      const nextDayShift1 = scheduleData[nextKey]?.shift1 ?? []
 
       minima.shift2 = Math.max(minima.shift2, shifts.shift2.length || DEFAULT_SHIFT_MIN_ROWS)
       minima.shift3 = Math.max(minima.shift3, shifts.shift3.length || DEFAULT_SHIFT_MIN_ROWS)
@@ -131,7 +94,7 @@ export default function Calendar({
     }
 
     return minima
-  }, [orderedDays, mergedScheduleData])
+  }, [orderedDays, scheduleData])
   const slotHeights = useMemo(() => {
     const calcSlotHeight = (rows) => {
       const safeRows = Math.max(DEFAULT_SHIFT_MIN_ROWS, rows || DEFAULT_SHIFT_MIN_ROWS)
@@ -148,7 +111,7 @@ export default function Calendar({
   const totalShiftHeightPx = slotHeights.shift2 + slotHeights.shift3 + slotHeights.nextDayShift1
   const deviceLegendItems = Array.from(
     new Set(
-      Object.values(mergedScheduleData)
+      Object.values(scheduleData)
         .flatMap((day) => [
           ...(day?.shift1 ?? []),
           ...(day?.shift2 ?? []),
@@ -237,15 +200,13 @@ export default function Calendar({
         <div className="flex gap-1.5 flex-1 overflow-x-auto">
           {orderedDays.map((date) => {
             const key    = toDateKey(date)
-            const shifts = mergedScheduleData[key] ?? emptyDayShifts()
+            const shifts = scheduleData[key] ?? { shift1: [], shift2: [], shift3: [] }
             const isToday   = date.getTime() === today.getTime()
             const isWeekend  = date.getDay() === 0 || date.getDay() === 6
             // Get next day's shift1 for display
             const nextDate = addDays(date, 1)
             const nextKey = toDateKey(nextDate)
-            const nextDayShift1 = mergedScheduleData[nextKey]?.shift1 ?? []
-            const shiftVariant = daySourceByKey[key] === 'previous' ? 'previous' : 'current'
-            const nextDayShift1Variant = daySourceByKey[nextKey] === 'previous' ? 'previous' : 'current'
+            const nextDayShift1 = scheduleData[nextKey]?.shift1 ?? []
             // Which shifts on this date are part of the active test window?
             const activeShifts = new Set()
             if (key === activeWindow.shift3Date) activeShifts.add(3)
@@ -261,11 +222,6 @@ export default function Calendar({
                 shifts={shifts}
                 nextDayShift1={nextDayShift1}
                 nextDayShift1Active={nextDayShift1Active}
-                shiftVariants={{
-                  shift2: shiftVariant,
-                  shift3: shiftVariant,
-                  nextDayShift1: nextDayShift1Variant,
-                }}
                 shiftMinRows={shiftMinRows}
                 slotHeights={slotHeights}
                 showShift2={isWeekend || (daytimeDateKey !== null && key === daytimeDateKey)}
@@ -282,7 +238,6 @@ export default function Calendar({
         <span className="flex items-center gap-1.5"><span className="w-2.5 h-2.5 rounded-sm bg-gray-500 inline-block" />Pending</span>
         <span className="flex items-center gap-1.5"><span className="w-2.5 h-2.5 rounded-sm bg-green-700 inline-block" />Completed</span>
         <span className="flex items-center gap-1.5"><span className="w-2.5 h-2.5 rounded-sm bg-red-700 inline-block" />Rerun Required</span>
-        <span className="flex items-center gap-1.5"><span className="w-2.5 h-2.5 rounded-sm bg-gray-400/70 inline-block" />Previous Schedule (faded)</span>
         {deviceLegendItems.map((device) => (
           <span key={device} className="flex items-center gap-1.5">
             <span className={`w-2.5 h-2.5 rounded-sm inline-block ${getDeviceAccentClass(device)}`} />
diff --git a/frontend/src/components/DayColumn.jsx b/frontend/src/components/DayColumn.jsx
index 8432bd3..e360dee 100644
--- a/frontend/src/components/DayColumn.jsx
+++ b/frontend/src/components/DayColumn.jsx
@@ -9,7 +9,6 @@ export default function DayColumn({
   shifts = {},
   nextDayShift1 = [],
   nextDayShift1Active = false,
-  shiftVariants = { shift2: 'current', shift3: 'current', nextDayShift1: 'current' },
   showShift2 = false,
   shiftMinRows = { shift2: 1, shift3: 1, nextDayShift1: 1 },
   slotHeights = { shift2: 0, shift3: 0, nextDayShift1: 0 },
@@ -53,7 +52,6 @@ export default function DayColumn({
           tests={shifts.shift2}
           visible={true}
           active={activeShifts.has(2)}
-          variant={shiftVariants.shift2}
           windowDetails={getWindowForShift(2)}
           minContentRows={shiftMinRows.shift2}
           slotHeightPx={slotHeights.shift2}
@@ -63,7 +61,6 @@ export default function DayColumn({
           tests={shifts.shift3}
           visible={true}
           active={activeShifts.has(3)}
-          variant={shiftVariants.shift3}
           windowDetails={getWindowForShift(3)}
           minContentRows={shiftMinRows.shift3}
           slotHeightPx={slotHeights.shift3}
@@ -73,7 +70,6 @@ export default function DayColumn({
           tests={nextDayShift1}
           visible={true}
           active={nextDayShift1Active}
-          variant={shiftVariants.nextDayShift1}
           windowDetails={getNextDayShift1Window()}
           minContentRows={shiftMinRows.nextDayShift1}
           slotHeightPx={slotHeights.nextDayShift1}
diff --git a/frontend/src/components/ShiftSlot.jsx b/frontend/src/components/ShiftSlot.jsx
index 03bd9a4..7ece73e 100644
--- a/frontend/src/components/ShiftSlot.jsx
+++ b/frontend/src/components/ShiftSlot.jsx
@@ -7,7 +7,6 @@ export default function ShiftSlot({
   tests = [],
   visible = true,
   active = false,
-  variant = 'current',
   windowDetails = null,
   minContentRows = 3,
   slotHeightPx = null,
@@ -16,7 +15,6 @@ export default function ShiftSlot({
   if (!visible) return null
 
   const clickable = Boolean(windowDetails && onWindowSelect)
-  const isPrevious = variant === 'previous'
   const targetRows = Math.max(1, minContentRows)
   const minContentHeightPx = (targetRows * TEST_CARD_ROW_HEIGHT_PX) + ((targetRows - 1) * TEST_CARD_ROW_GAP_PX)
   const outerMinHeightPx = Number.isFinite(slotHeightPx) && slotHeightPx > 0
@@ -37,7 +35,7 @@ export default function ShiftSlot({
       style={{ minHeight: `${outerMinHeightPx}px` }}
       className={`border-t pt-1 pb-1.5 transition-colors ${
         active ? 'border-blue-500/50 bg-blue-950/20 rounded' : 'border-gray-700/60'
-      } ${isPrevious ? 'bg-gray-700/15' : ''} ${clickable ? 'cursor-pointer hover:bg-gray-700/25 focus:outline-none focus:ring-1 focus:ring-cyan-400/70' : ''}`}
+      } ${clickable ? 'cursor-pointer hover:bg-gray-700/25 focus:outline-none focus:ring-1 focus:ring-cyan-400/70' : ''}`}
     >
       <div
         className="flex flex-col gap-0.5 px-1 min-h-4"
@@ -48,7 +46,6 @@ export default function ShiftSlot({
             <TestCard
               key={`${test.test_id}-${test.device}-${test.scheduled_date ?? 'na'}-${test.shift_index ?? 'na'}-${test.sequence_in_shift ?? index}`}
               test={test}
-              isPrevious={isPrevious}
             />
           ))
         )}
diff --git a/frontend/src/components/TestCard.jsx b/frontend/src/components/TestCard.jsx
index 0458883..29727bf 100644
--- a/frontend/src/components/TestCard.jsx
+++ b/frontend/src/components/TestCard.jsx
@@ -46,7 +46,7 @@ function formatConfig(config) {
   return formattedEntries.length > 0 ? formattedEntries.join('; ') : '—'
 }
 
-export default function TestCard({ test, isPrevious = false }) {
+export default function TestCard({ test }) {
   const style = STATUS_STYLES[test.status] ?? STATUS_STYLES.pending
   const deviceAccentClass = getDeviceAccentClass(test.device)
   const cardRef = useRef(null)
@@ -90,7 +90,7 @@ export default function TestCard({ test, isPrevious = false }) {
   return (
     <div ref={cardRef} className="relative">
       <div
-        className={`relative px-1.5 py-0.5 pl-3 rounded border text-xs font-mono truncate cursor-default select-none ${style} ${isPrevious ? 'opacity-60' : ''}`}
+        className={`relative px-1.5 py-0.5 pl-3 rounded border text-xs font-mono truncate cursor-default select-none ${style}`}
         style={{ maxWidth: '100%' }}
       >
         <span className={`absolute inset-y-0 left-0 w-1 rounded-l ${deviceAccentClass}`} aria-hidden="true" />