diff --git a/tests/unit/handlers/finance.handlers.test.js b/tests/unit/handlers/finance.handlers.test.js
index de84b0a..e0fa401 100644
--- a/tests/unit/handlers/finance.handlers.test.js
+++ b/tests/unit/handlers/finance.handlers.test.js
@@ -1681,3 +1681,36 @@ test('getEbitda - a monthly LCOE override only moves its own month', async (t) =
 
   t.pass()
 })
+
+// The mempool worker only serves HISTORICAL_* keys and destructures `prices` out of its
+// fallback reply, so asking for 'prices' returned nothing and every historical day was
+// silently valued at today's spot price.
+test('getEbitda and getHashRevenue request the historical price key the mempool worker serves', async (t) => {
+  const requestedKeys = []
+  const dayTs = 1700006400000
+
+  const makeCtx = () => withDataProxy({
+    conf: { orks: [{ rpcPublicKey: 'key1' }] },
+    net_r0: {
+      jRequest: async (key, method, payload) => {
+        if (method === 'tailLog') return [{ ts: dayTs, site_power_w: 5000, hashrate_mhs_5m_sum_aggr: 100 }]
+        if (method === 'getWrkExtData') {
+          const qKey = payload.query && payload.query.key
+          if (payload.type === 'mempool') requestedKeys.push(qKey)
+          if (qKey === 'transactions') return [{ ts: dayTs, transactions: [{ ts: dayTs, changed_balance: 0.5 }] }]
+          if (qKey === 'HISTORICAL_PRICES') return [{ ts: dayTs, priceUSD: 61000 }]
+        }
+        return []
+      }
+    },
+    globalDataLib: { getGlobalData: async () => [] }
+  })
+
+  const req = { query: { start: dayTs - 86400000, end: dayTs + 86400000 } }
+  await getEbitda(makeCtx(), req, {})
+  await getHashRevenue(makeCtx(), req, {})
+
+  t.ok(requestedKeys.includes('HISTORICAL_PRICES'), 'asks for the key the worker actually serves')
+  t.absent(requestedKeys.includes('prices'), 'never asks for the stripped `prices` key')
+  t.pass()
+})
diff --git a/tests/unit/handlers/finance.utils.test.js b/tests/unit/handlers/finance.utils.test.js
index 65a0adb..ccff0c1 100644
--- a/tests/unit/handlers/finance.utils.test.js
+++ b/tests/unit/handlers/finance.utils.test.js
@@ -73,8 +73,64 @@ test('normalizeTimestampMs - ms passthrough', (t) => {
   t.pass()
 })
 
+test('normalizeTimestampMs - Ocean ISO-8601 string without a timezone is read as UTC', (t) => {
+  t.is(normalizeTimestampMs('2026-05-28T16:46:30'), Date.UTC(2026, 4, 28, 16, 46, 30))
+  t.pass()
+})
+
+test('normalizeTimestampMs - ISO-8601 string with an explicit zone keeps that zone', (t) => {
+  t.is(normalizeTimestampMs('2026-05-28T16:46:30Z'), Date.UTC(2026, 4, 28, 16, 46, 30))
+  t.is(normalizeTimestampMs('2026-05-28T16:46:30+02:00'), Date.UTC(2026, 4, 28, 14, 46, 30))
+  t.pass()
+})
+
+test('normalizeTimestampMs - numeric strings normalize like numbers', (t) => {
+  t.is(normalizeTimestampMs('1700006400'), 1700006400000, 'seconds as a string')
+  t.is(normalizeTimestampMs('1700006400000'), 1700006400000, 'ms as a string')
+  t.pass()
+})
+
+test('normalizeTimestampMs - unparseable input returns 0 rather than NaN', (t) => {
+  t.is(normalizeTimestampMs('not-a-date'), 0)
+  t.is(normalizeTimestampMs(NaN), 0)
+  t.is(normalizeTimestampMs(Infinity), 0)
+  t.is(normalizeTimestampMs({}), 0)
+  t.pass()
+})
+
 // ==================== processTransactions ====================
 
+test('processTransactions - Ocean earnings dated by ISO string are not dropped', (t) => {
+  const results = [
+    [{
+      ts: 1779926400000,
+      transactions: [
+        { ts: '2026-05-28T16:46:30', satoshis_net_earned: 2632155, fees_colected_satoshis: 27238 }
+      ]
+    }]
+  ]
+
+  const daily = processTransactions(results, { trackFees: true })
+  const day = daily[Date.UTC(2026, 4, 28)]
+  t.ok(day, 'the ISO-dated earning lands on its own UTC day')
+  t.is(day.revenueBTC, 2632155 / 1e8)
+  t.is(day.feesBTC, 27238 / 1e8)
+  t.pass()
+})
+
+test('processTransactions - mixed f2pool and Ocean racks both contribute', (t) => {
+  const results = [
+    [{ transactions: [{ created_at: 1785621600, changed_balance: 0.0001, mining_extra: { tx_fee: 0.000001 } }] }],
+    [{ transactions: [{ ts: '2026-05-28T16:46:30', satoshis_net_earned: 100000000 }] }]
+  ]
+
+  const daily = processTransactions(results, { trackFees: true })
+  const total = Object.values(daily).reduce((sum, d) => sum + d.revenueBTC, 0)
+  t.is(Object.keys(daily).length, 2, 'one day per pool')
+  t.is(total, 1.0001, 'both pools counted')
+  t.pass()
+})
+
 test('processTransactions - Ocean data (sats)', (t) => {
   const results = [
     [{ transactions: [{ ts: 1700006400000, satoshis_net_earned: 50000000 }] }]
diff --git a/tests/unit/lib/period.utils.test.js b/tests/unit/lib/period.utils.test.js
index c13f7e0..011e60c 100644
--- a/tests/unit/lib/period.utils.test.js
+++ b/tests/unit/lib/period.utils.test.js
@@ -211,3 +211,32 @@ test('getPeriodEndDate - yearly returns next year', (t) => {
   t.is(result.getFullYear(), 2024, 'should be next year')
   t.pass()
 })
+
+test('aggregateByPeriod - monthly buckets are grouped and stamped in UTC', (t) => {
+  const log = [
+    { ts: Date.UTC(2026, 7, 1), revenueBTC: 1 },
+    { ts: Date.UTC(2026, 7, 2), revenueBTC: 2 }
+  ]
+
+  const [month] = aggregateByPeriod(log, 'monthly')
+
+  t.is(month.ts, Date.UTC(2026, 7, 1), 'stamped on the UTC first of the month')
+  t.is(month.month, 8)
+  t.is(month.monthName, 'August', 'named from the UTC month, not the host month')
+  t.is(month.revenueBTC, 3, 'both UTC days land in the same bucket')
+  t.pass()
+})
+
+test('aggregateByPeriod - yearly buckets are grouped and stamped in UTC', (t) => {
+  const log = [
+    { ts: Date.UTC(2026, 0, 1), revenueBTC: 1 },
+    { ts: Date.UTC(2026, 11, 31), revenueBTC: 2 }
+  ]
+
+  const [year] = aggregateByPeriod(log, 'yearly')
+
+  t.is(year.ts, Date.UTC(2026, 0, 1), 'stamped on the UTC first of the year')
+  t.is(year.year, 2026)
+  t.is(year.revenueBTC, 3, 'both UTC days land in the same bucket')
+  t.pass()
+})
diff --git a/workers/lib/period.utils.js b/workers/lib/period.utils.js
index 583b610..3d5701b 100644
--- a/workers/lib/period.utils.js
+++ b/workers/lib/period.utils.js
@@ -49,9 +49,9 @@ const aggregateByPeriod = (log, period, nonMetricKeys = [], options = {}) => {
     let groupKey
 
     if (period === PERIOD_TYPES.MONTHLY) {
-      groupKey = `${date.getFullYear()}-${String(date.getMonth() + 1).padStart(2, '0')}`
+      groupKey = `${date.getUTCFullYear()}-${String(date.getUTCMonth() + 1).padStart(2, '0')}`
     } else if (period === PERIOD_TYPES.YEARLY) {
-      groupKey = `${date.getFullYear()}`
+      groupKey = `${date.getUTCFullYear()}`
     } else if (period === PERIOD_TYPES.WEEKLY) {
       const day = date.getUTCDay()
       const diff = date.getUTCDate() - day
@@ -97,7 +97,7 @@ const aggregateByPeriod = (log, period, nonMetricKeys = [], options = {}) => {
       if (period === PERIOD_TYPES.MONTHLY) {
         const [year, month] = groupKey.split('-').map(Number)
 
-        const newDate = new Date(year, month - 1, 1)
+        const newDate = new Date(Date.UTC(year, month - 1, 1))
         if (isNaN(newDate.getTime())) {
           throw new Error(`Invalid date for monthly grouping: ${groupKey}`)
         }
@@ -105,11 +105,11 @@ const aggregateByPeriod = (log, period, nonMetricKeys = [], options = {}) => {
         aggregated.ts = newDate.getTime()
         aggregated.month = month
         aggregated.year = year
-        aggregated.monthName = newDate.toLocaleString('en-US', { month: 'long' })
+        aggregated.monthName = newDate.toLocaleString('en-US', { month: 'long', timeZone: 'UTC' })
       } else if (period === PERIOD_TYPES.YEARLY) {
         const year = parseInt(groupKey)
 
-        const newDate = new Date(year, 0, 1)
+        const newDate = new Date(Date.UTC(year, 0, 1))
         if (isNaN(newDate.getTime())) {
           throw new Error(`Invalid date for yearly grouping: ${groupKey}`)
         }
diff --git a/workers/lib/server/handlers/finance.handlers.js b/workers/lib/server/handlers/finance.handlers.js
index ccd4f84..cafba9d 100644
--- a/workers/lib/server/handlers/finance.handlers.js
+++ b/workers/lib/server/handlers/finance.handlers.js
@@ -110,7 +110,7 @@ async function getEnergyBalance (ctx, req) {
     const revenueBTC = transactions.revenueBTC || 0
     const revenueUSD = revenueBTC * btcPrice
 
-    const monthKey = `${new Date(ts).getFullYear()}-${String(new Date(ts).getMonth() + 1).padStart(2, '0')}`
+    const monthKey = getMonthKeyUtc(ts)
     const costs = costsByMonth[monthKey] || {}
     const energyCostUSD = resolveEnergyCostsUSD(costs, powerMWh, resolveLcoeUsdPerMwh(costParameters, monthKey))
     const totalCostUSD = energyCostUSD + (costs.operationalCostPerDay || 0)
@@ -156,7 +156,10 @@ async function getEnergyBalance (ctx, req) {
   }
 
   const aggregated = aggregateByPeriod(log, period, [], {
-    meanKeys: ['sitePowerMW', 'btcPrice', 'curtailmentRate', 'operationalIssuesRate', 'powerUtilization']
+    meanKeys: [
+      'sitePowerMW', 'powerW', 'btcPrice', 'energyRevenuePerMWh', 'allInCostPerMWh',
+      'curtailmentRate', 'operationalIssuesRate', 'powerUtilization'
+    ]
   })
 
   for (const entry of aggregated) {
@@ -327,7 +330,7 @@ async function getEbitda (ctx, req) {
 
     (cb) => ctx.dataProxy.requestData(RPC_METHODS.GET_WRK_EXT_DATA, {
       type: WORKER_TYPES.MEMPOOL,
-      query: { key: 'prices', start, end }
+      query: { key: 'HISTORICAL_PRICES', start, end }
     }).then(r => cb(null, r)).catch(cb),
 
     (cb) => ctx.dataProxy.requestData(RPC_METHODS.GET_WRK_EXT_DATA, {
@@ -365,7 +368,7 @@ async function getEbitda (ctx, req) {
     const hashrateMhs = dailyHashrate[dayTs] || 0
     const powerMWh = (powerW * 24) / 1000000
 
-    const monthKey = `${new Date(ts).getFullYear()}-${String(new Date(ts).getMonth() + 1).padStart(2, '0')}`
+    const monthKey = getMonthKeyUtc(ts)
     const costs = costsByMonth[monthKey] || {}
     const energyCostsUSD = resolveEnergyCostsUSD(costs, powerMWh, resolveLcoeUsdPerMwh(costParameters, monthKey))
     const operationalCostsUSD = costs.operationalCostPerDay || 0
@@ -502,7 +505,7 @@ async function getCostSummary (ctx, req) {
     const powerW = dailyConsumption[dayTs] || 0
     const consumptionMWh = (powerW * 24) / 1000000
 
-    const monthKey = `${new Date(ts).getFullYear()}-${String(new Date(ts).getMonth() + 1).padStart(2, '0')}`
+    const monthKey = getMonthKeyUtc(ts)
     const costs = costsByMonth[monthKey] || {}
     const energyCostsUSD = resolveEnergyCostsUSD(costs, consumptionMWh, resolveLcoeUsdPerMwh(costParameters, monthKey))
     const operationalCostsUSD = costs.operationalCostPerDay || 0
@@ -827,7 +830,7 @@ async function getRevenueSummary (ctx, req) {
     const hashrateMhs = dailyHashrate[dayTs] || 0
     const hashratePhs = hashrateMhs / 1e9
 
-    const monthKey = `${new Date(ts).getFullYear()}-${String(new Date(ts).getMonth() + 1).padStart(2, '0')}`
+    const monthKey = getMonthKeyUtc(ts)
     const costs = costsByMonth[monthKey] || {}
     const energyCostsUSD = resolveEnergyCostsUSD(costs, consumptionMWh, resolveLcoeUsdPerMwh(costParameters, monthKey))
     const operationalCostsUSD = costs.operationalCostPerDay || 0
@@ -992,7 +995,7 @@ async function getHashRevenue (ctx, req) {
 
     (cb) => ctx.dataProxy.requestData(RPC_METHODS.GET_WRK_EXT_DATA, {
       type: WORKER_TYPES.MEMPOOL,
-      query: { key: 'prices', start, end }
+      query: { key: 'HISTORICAL_PRICES', start, end }
     }).then(r => cb(null, r)).catch(cb),
 
     (cb) => ctx.dataProxy.requestData(RPC_METHODS.GET_WRK_EXT_DATA, {
@@ -1183,6 +1186,14 @@ function calculateHashRevenueSummary (log) {
 const WATTS_PER_MW = 1e6
 const HOURS_PER_DAY = 24
 
+// Day timestamps are on the UTC grid, and costsByMonth / costParameters.overrides are keyed by
+// calendar month, so the key has to be derived in UTC too - local getters move a UTC midnight
+// into the previous month on any host west of UTC.
+function getMonthKeyUtc (ts) {
+  const date = new Date(ts)
+  return `${date.getUTCFullYear()}-${String(date.getUTCMonth() + 1).padStart(2, '0')}`
+}
+
 function getStartOfMonthUtc (ts) {
   const date = new Date(ts)
   return Date.UTC(date.getUTCFullYear(), date.getUTCMonth(), 1)
@@ -1273,7 +1284,7 @@ function processDailyRevenueBtc (results, start, end) {
     if (!Array.isArray(data)) continue
     for (const entry of data) {
       if (!entry || !entry.ts || !Array.isArray(entry.transactions)) continue
-      const dayTs = getStartOfDay(normalizeTimestampMs(Number(entry.ts)))
+      const dayTs = getStartOfDay(normalizeTimestampMs(entry.ts))
       if (!dayTs || dayTs < startDay || dayTs > endDay) continue
       let revenueBTC = 0
       for (const tx of entry.transactions) {
diff --git a/workers/lib/server/handlers/finance.utils.js b/workers/lib/server/handlers/finance.utils.js
index 853c8e5..5877b7f 100644
--- a/workers/lib/server/handlers/finance.utils.js
+++ b/workers/lib/server/handlers/finance.utils.js
@@ -18,8 +18,26 @@ function validateStartEnd (req) {
   return { start, end }
 }
 
+// Worker timestamps arrive in whatever shape the upstream pool API uses: unix seconds
+// (f2pool `created_at`), unix ms, or an ISO-8601 string (ocean `ts`, e.g. "2026-05-28T16:46:30").
+// Anything this returns unparsed becomes NaN in getStartOfDay and the record is dropped without
+// a trace, so every shape has to be handled here rather than at the call sites.
 function normalizeTimestampMs (ts) {
   if (!ts) return 0
+
+  if (typeof ts === 'string') {
+    const numeric = Number(ts)
+    if (!Number.isNaN(numeric)) return normalizeTimestampMs(numeric)
+
+    // Ocean sends no timezone designator; these timestamps are UTC, and Date.parse would
+    // otherwise read them as host-local and shift the day bucket.
+    const hasZone = /(?:Z|[+-]\d{2}:?\d{2})$/.test(ts)
+    const parsed = Date.parse(hasZone ? ts : `${ts}Z`)
+    return Number.isNaN(parsed) ? 0 : parsed
+  }
+
+  if (typeof ts !== 'number' || !Number.isFinite(ts)) return 0
+
   return ts < 1e12 ? ts * 1000 : ts
 }