diff --git a/__tests__/lib/string.test.ts b/__tests__/lib/string.test.ts
index 78478a26..30072ccb 100644
--- a/__tests__/lib/string.test.ts
+++ b/__tests__/lib/string.test.ts
@@ -6,7 +6,6 @@ import {createFullHandle, makeValidHandle} from '../../src/lib/strings/handles'
 import {enforceLen} from '../../src/lib/strings/helpers'
 import {detectLinkables} from '../../src/lib/strings/rich-text-detection'
 import {shortenLinks} from '../../src/lib/strings/rich-text-manip'
-import {ago} from '../../src/lib/strings/time'
 import {
   makeRecordUri,
   toNiceDomain,
@@ -142,79 +141,6 @@ describe('makeRecordUri', () => {
   })
 })
 
-// FIXME: Reenable after fixing non-deterministic test.
-describe.skip('ago', () => {
-  const oneYearDate = new Date(
-    new Date().setMonth(new Date().getMonth() - 11),
-  ).setDate(new Date().getDate() - 28)
-
-  const inputs = [
-    1671461038,
-    '04 Dec 1995 00:12:00 GMT',
-    new Date(),
-    new Date().setSeconds(new Date().getSeconds() - 10),
-    new Date().setMinutes(new Date().getMinutes() - 10),
-    new Date().setHours(new Date().getHours() - 1),
-    new Date().setDate(new Date().getDate() - 1),
-    new Date().setDate(new Date().getDate() - 20),
-    new Date().setDate(new Date().getDate() - 25),
-    new Date().setDate(new Date().getDate() - 28),
-    new Date().setDate(new Date().getDate() - 29),
-    new Date().setDate(new Date().getDate() - 30),
-    new Date().setMonth(new Date().getMonth() - 1),
-    new Date(new Date().setMonth(new Date().getMonth() - 1)).setDate(
-      new Date().getDate() - 20,
-    ),
-    new Date(new Date().setMonth(new Date().getMonth() - 1)).setDate(
-      new Date().getDate() - 25,
-    ),
-    new Date(new Date().setMonth(new Date().getMonth() - 1)).setDate(
-      new Date().getDate() - 28,
-    ),
-    new Date(new Date().setMonth(new Date().getMonth() - 1)).setDate(
-      new Date().getDate() - 29,
-    ),
-    new Date().setMonth(new Date().getMonth() - 11),
-    new Date(new Date().setMonth(new Date().getMonth() - 11)).setDate(
-      new Date().getDate() - 20,
-    ),
-    new Date(new Date().setMonth(new Date().getMonth() - 11)).setDate(
-      new Date().getDate() - 25,
-    ),
-    oneYearDate,
-  ]
-  const outputs = [
-    new Date(1671461038).toLocaleDateString(),
-    new Date('04 Dec 1995 00:12:00 GMT').toLocaleDateString(),
-    'now',
-    '10s',
-    '10m',
-    '1h',
-    '1d',
-    '20d',
-    '25d',
-    '28d',
-    '29d',
-    '1mo',
-    '1mo',
-    '1mo',
-    '1mo',
-    '2mo',
-    '2mo',
-    '11mo',
-    '11mo',
-    '11mo',
-    new Date(oneYearDate).toLocaleDateString(),
-  ]
-
-  it('correctly calculates how much time passed, in a string', () => {
-    for (let i = 0; i < inputs.length; i++) {
-      const result = ago(inputs[i])
-      expect(result).toEqual(outputs[i])
-    }
-  })
-})
-
 describe('makeValidHandle', () => {
   const inputs = [
     'test-handle-123',
diff --git a/src/lib/hooks/__tests__/useTimeAgo.test.ts b/src/lib/hooks/__tests__/useTimeAgo.test.ts
new file mode 100644
index 00000000..e74f9c62
--- /dev/null
+++ b/src/lib/hooks/__tests__/useTimeAgo.test.ts
@@ -0,0 +1,102 @@
+import {describe, expect, it} from '@jest/globals'
+import {MessageDescriptor} from '@lingui/core'
+import {addDays, subDays, subHours, subMinutes, subSeconds} from 'date-fns'
+
+import {dateDiff} from '../useTimeAgo'
+
+const lingui: any = (obj: MessageDescriptor) => obj.message
+
+const base = new Date('2024-06-17T00:00:00Z')
+
+describe('dateDiff', () => {
+  it(`works with numbers`, () => {
+    expect(dateDiff(subDays(base, 3), Number(base), {lingui})).toEqual('3d')
+  })
+  it(`works with strings`, () => {
+    expect(dateDiff(subDays(base, 3), base.toString(), {lingui})).toEqual('3d')
+  })
+  it(`works with dates`, () => {
+    expect(dateDiff(subDays(base, 3), base, {lingui})).toEqual('3d')
+  })
+
+  it(`equal values return now`, () => {
+    expect(dateDiff(base, base, {lingui})).toEqual('now')
+  })
+  it(`future dates return now`, () => {
+    expect(dateDiff(addDays(base, 3), base, {lingui})).toEqual('now')
+  })
+
+  it(`values < 5 seconds ago return now`, () => {
+    const then = subSeconds(base, 4)
+    expect(dateDiff(then, base, {lingui})).toEqual('now')
+  })
+  it(`values >= 5 seconds ago return seconds`, () => {
+    const then = subSeconds(base, 5)
+    expect(dateDiff(then, base, {lingui})).toEqual('5s')
+  })
+
+  it(`values < 1 min return seconds`, () => {
+    const then = subSeconds(base, 59)
+    expect(dateDiff(then, base, {lingui})).toEqual('59s')
+  })
+  it(`values >= 1 min return minutes`, () => {
+    const then = subSeconds(base, 60)
+    expect(dateDiff(then, base, {lingui})).toEqual('1m')
+  })
+  it(`minutes round down`, () => {
+    const then = subSeconds(base, 119)
+    expect(dateDiff(then, base, {lingui})).toEqual('1m')
+  })
+
+  it(`values < 1 hour return minutes`, () => {
+    const then = subMinutes(base, 59)
+    expect(dateDiff(then, base, {lingui})).toEqual('59m')
+  })
+  it(`values >= 1 hour return hours`, () => {
+    const then = subMinutes(base, 60)
+    expect(dateDiff(then, base, {lingui})).toEqual('1h')
+  })
+  it(`hours round down`, () => {
+    const then = subMinutes(base, 119)
+    expect(dateDiff(then, base, {lingui})).toEqual('1h')
+  })
+
+  it(`values < 1 day return hours`, () => {
+    const then = subHours(base, 23)
+    expect(dateDiff(then, base, {lingui})).toEqual('23h')
+  })
+  it(`values >= 1 day return days`, () => {
+    const then = subHours(base, 24)
+    expect(dateDiff(then, base, {lingui})).toEqual('1d')
+  })
+  it(`days round down`, () => {
+    const then = subHours(base, 47)
+    expect(dateDiff(then, base, {lingui})).toEqual('1d')
+  })
+
+  it(`values < 30 days return days`, () => {
+    const then = subDays(base, 29)
+    expect(dateDiff(then, base, {lingui})).toEqual('29d')
+  })
+  it(`values >= 30 days return months`, () => {
+    const then = subDays(base, 30)
+    expect(dateDiff(then, base, {lingui})).toEqual('1mo')
+  })
+  it(`months round down`, () => {
+    const then = subDays(base, 59)
+    expect(dateDiff(then, base, {lingui})).toEqual('1mo')
+  })
+  it(`values are rounded by increments of 30`, () => {
+    const then = subDays(base, 61)
+    expect(dateDiff(then, base, {lingui})).toEqual('2mo')
+  })
+
+  it(`values < 360 days return months`, () => {
+    const then = subDays(base, 359)
+    expect(dateDiff(then, base, {lingui})).toEqual('11mo')
+  })
+  it(`values >= 360 days return the earlier value`, () => {
+    const then = subDays(base, 360)
+    expect(dateDiff(then, base, {lingui})).toEqual(then.toLocaleDateString())
+  })
+})
diff --git a/src/lib/hooks/useTimeAgo.ts b/src/lib/hooks/useTimeAgo.ts
new file mode 100644
index 00000000..5f0782f9
--- /dev/null
+++ b/src/lib/hooks/useTimeAgo.ts
@@ -0,0 +1,95 @@
+import {useCallback, useMemo} from 'react'
+import {msg, plural} from '@lingui/macro'
+import {I18nContext, useLingui} from '@lingui/react'
+import {differenceInSeconds} from 'date-fns'
+
+export type TimeAgoOptions = {
+  lingui: I18nContext['_']
+  format?: 'long' | 'short'
+}
+
+export function useGetTimeAgo() {
+  const {_} = useLingui()
+  return useCallback(
+    (
+      date: number | string | Date,
+      options?: Omit<TimeAgoOptions, 'lingui'>,
+    ) => {
+      return dateDiff(date, Date.now(), {lingui: _, format: options?.format})
+    },
+    [_],
+  )
+}
+
+export function useTimeAgo(
+  date: number | string | Date,
+  options?: Omit<TimeAgoOptions, 'lingui'>,
+): string {
+  const timeAgo = useGetTimeAgo()
+  return useMemo(() => {
+    return timeAgo(date, {...options})
+  }, [date, options, timeAgo])
+}
+
+const NOW = 5
+const MINUTE = 60
+const HOUR = MINUTE * 60
+const DAY = HOUR * 24
+const MONTH_30 = DAY * 30
+
+/**
+ * Returns the difference between `earlier` and `later` dates, formatted as a
+ * natural language string.
+ *
+ * - All month are considered exactly 30 days.
+ * - Dates assume `earlier` <= `later`, and will otherwise return 'now'.
+ * - Differences >= 360 days are returned as the "M/D/YYYY" string
+ * - All values round down
+ */
+export function dateDiff(
+  earlier: number | string | Date,
+  later: number | string | Date,
+  options: TimeAgoOptions,
+): string {
+  const _ = options.lingui
+  const format = options?.format || 'short'
+  const long = format === 'long'
+  const diffSeconds = differenceInSeconds(new Date(later), new Date(earlier))
+
+  if (diffSeconds < NOW) {
+    return _(msg`now`)
+  } else if (diffSeconds < MINUTE) {
+    return `${diffSeconds}${
+      long ? ` ${plural(diffSeconds, {one: 'second', other: 'seconds'})}` : 's'
+    }`
+  } else if (diffSeconds < HOUR) {
+    const diff = Math.floor(diffSeconds / MINUTE)
+    return `${diff}${
+      long ? ` ${plural(diff, {one: 'minute', other: 'minutes'})}` : 'm'
+    }`
+  } else if (diffSeconds < DAY) {
+    const diff = Math.floor(diffSeconds / HOUR)
+    return `${diff}${
+      long ? ` ${plural(diff, {one: 'hour', other: 'hours'})}` : 'h'
+    }`
+  } else if (diffSeconds < MONTH_30) {
+    const diff = Math.floor(diffSeconds / DAY)
+    return `${diff}${
+      long ? ` ${plural(diff, {one: 'day', other: 'days'})}` : 'd'
+    }`
+  } else {
+    const diff = Math.floor(diffSeconds / MONTH_30)
+    if (diff < 12) {
+      return `${diff}${
+        long ? ` ${plural(diff, {one: 'month', other: 'months'})}` : 'mo'
+      }`
+    } else {
+      const str = new Date(earlier).toLocaleDateString()
+
+      if (long) {
+        return _(msg`on ${str}`)
+      }
+      return str
+    }
+  }
+}
diff --git a/src/lib/strings/time.ts b/src/lib/strings/time.ts
index 8de4b52a..1194e024 100644
--- a/src/lib/strings/time.ts
+++ b/src/lib/strings/time.ts
@@ -1,45 +1,3 @@
-const NOW = 5
-const MINUTE = 60
-const HOUR = MINUTE * 60
-const DAY = HOUR * 24
-const MONTH_30 = DAY * 30
-const MONTH = DAY * 30.41675 // This results in 365.001 days in a year, which is close enough for nearly all cases
-export function ago(date: number | string | Date): string {
-  let ts: number
-  if (typeof date === 'string') {
-    ts = Number(new Date(date))
-  } else if (date instanceof Date) {
-    ts = Number(date)
-  } else {
-    ts = date
-  }
-  const diffSeconds = Math.floor((Date.now() - ts) / 1e3)
-  if (diffSeconds < NOW) {
-    return `now`
-  } else if (diffSeconds < MINUTE) {
-    return `${diffSeconds}s`
-  } else if (diffSeconds < HOUR) {
-    return `${Math.floor(diffSeconds / MINUTE)}m`
-  } else if (diffSeconds < DAY) {
-    return `${Math.floor(diffSeconds / HOUR)}h`
-  } else if (diffSeconds < MONTH_30) {
-    return `${Math.round(diffSeconds / DAY)}d`
-  } else {
-    let months = diffSeconds / MONTH
-    if (months % 1 >= 0.9) {
-      months = Math.ceil(months)
-    } else {
-      months = Math.floor(months)
-    }
-
-    if (months < 12) {
-      return `${months}mo`
-    } else {
-      return new Date(ts).toLocaleDateString()
-    }
-  }
-}
-
 export function niceDate(date: number | string | Date) {
   const d = new Date(date)
   return `${d.toLocaleDateString('en-us', {
diff --git a/src/view/com/util/TimeElapsed.tsx b/src/view/com/util/TimeElapsed.tsx
index a5d3a537..d939b316 100644
--- a/src/view/com/util/TimeElapsed.tsx
+++ b/src/view/com/util/TimeElapsed.tsx
@@ -1,26 +1,26 @@
 import React from 'react'
 
+import {useGetTimeAgo} from '#/lib/hooks/useTimeAgo'
 import {useTickEveryMinute} from '#/state/shell'
-import {ago} from 'lib/strings/time'
 
 export function TimeElapsed({
   timestamp,
   children,
-  timeToString = ago,
+  timeToString,
 }: {
   timestamp: string
   children: ({timeElapsed}: {timeElapsed: string}) => JSX.Element
   timeToString?: (timeElapsed: string) => string
 }) {
+  const ago = useGetTimeAgo()
+  const format = timeToString ?? ago
   const tick = useTickEveryMinute()
-  const [timeElapsed, setTimeAgo] = React.useState(() =>
-    timeToString(timestamp),
-  )
+  const [timeElapsed, setTimeAgo] = React.useState(() => format(timestamp))
 
   const [prevTick, setPrevTick] = React.useState(tick)
   if (prevTick !== tick) {
     setPrevTick(tick)
-    setTimeAgo(timeToString(timestamp))
+    setTimeAgo(format(timestamp))
   }
 
   return children({timeElapsed})
diff --git a/src/view/screens/Log.tsx b/src/view/screens/Log.tsx
index e727a1fb..e10aa83a 100644
--- a/src/view/screens/Log.tsx
+++ b/src/view/screens/Log.tsx
@@ -1,18 +1,19 @@
 import React from 'react'
 import {StyleSheet, TouchableOpacity, View} from 'react-native'
-import {useFocusEffect} from '@react-navigation/native'
 import {FontAwesomeIcon} from '@fortawesome/react-native-fontawesome'
-import {NativeStackScreenProps, CommonNavigatorParams} from 'lib/routes/types'
-import {ScrollView} from '../com/util/Views'
-import {s} from 'lib/styles'
-import {ViewHeader} from '../com/util/ViewHeader'
-import {Text} from '../com/util/text/Text'
-import {usePalette} from 'lib/hooks/usePalette'
-import {getEntries} from '#/logger/logDump'
-import {ago} from 'lib/strings/time'
-import {useLingui} from '@lingui/react'
 import {msg} from '@lingui/macro'
+import {useLingui} from '@lingui/react'
+import {useFocusEffect} from '@react-navigation/native'
+
+import {useGetTimeAgo} from '#/lib/hooks/useTimeAgo'
+import {getEntries} from '#/logger/logDump'
 import {useSetMinimalShellMode} from '#/state/shell'
+import {usePalette} from 'lib/hooks/usePalette'
+import {CommonNavigatorParams, NativeStackScreenProps} from 'lib/routes/types'
+import {s} from 'lib/styles'
+import {Text} from '../com/util/text/Text'
+import {ViewHeader} from '../com/util/ViewHeader'
+import {ScrollView} from '../com/util/Views'
 
 export function LogScreen({}: NativeStackScreenProps<
   CommonNavigatorParams,
@@ -22,6 +23,7 @@ export function LogScreen({}: NativeStackScreenProps<
   const {_} = useLingui()
   const setMinimalShellMode = useSetMinimalShellMode()
   const [expanded, setExpanded] = React.useState<string[]>([])
+  const timeAgo = useGetTimeAgo()
 
   useFocusEffect(
     React.useCallback(() => {
@@ -70,7 +72,7 @@ export function LogScreen({}: NativeStackScreenProps<
                     />
                   ) : undefined}
                   <Text type="sm" style={[styles.ts, pal.textLight]}>
-                    {ago(entry.timestamp)}
+                    {timeAgo(entry.timestamp)}
                   </Text>
                 </TouchableOpacity>
                 {expanded.includes(entry.id) ? (