diff --git a/src/features/mass_deleter.js b/src/features/mass_deleter.js
index c93a1ee59..3655b70bc 100644
--- a/src/features/mass_deleter.js
+++ b/src/features/mass_deleter.js
@@ -2,6 +2,7 @@ import { dom } from '../utils/dom.js';
 import { megaEdit } from '../utils/mega_editor.js';
 import { modalCancelButton, modalCompleteButton, showErrorModal, showModal } from '../utils/modals.js';
 import { addSidebarItem, removeSidebarItem } from '../utils/sidebar.js';
+import { dateTimeFormat } from '../utils/text_format.js';
 import { apiFetch } from '../utils/tumblr_helpers.js';
 
 const timezoneOffsetMs = new Date().getTimezoneOffset() * 60000;
@@ -18,14 +19,6 @@ const createNowString = () => {
 
   return `${YYYY}-${MM}-${DD}T${hh}:${mm}`;
 };
-const dateTimeFormat = new Intl.DateTimeFormat(document.documentElement.lang, {
-  year: 'numeric',
-  month: 'long',
-  day: 'numeric',
-  hour: 'numeric',
-  minute: 'numeric',
-  timeZoneName: 'short'
-});
 
 const showDeleteDraftsPrompt = () => {
   const form = dom('form', { id: 'xkit-mass-deleter-delete-drafts' }, { submit: confirmDeleteDrafts }, [
diff --git a/src/features/mass_privater.js b/src/features/mass_privater.js
index 69ca20b6c..5efa633fd 100644
--- a/src/features/mass_privater.js
+++ b/src/features/mass_privater.js
@@ -2,6 +2,7 @@ import { dom } from '../utils/dom.js';
 import { megaEdit } from '../utils/mega_editor.js';
 import { showModal, modalCancelButton, modalCompleteButton, hideModal, showErrorModal } from '../utils/modals.js';
 import { addSidebarItem, removeSidebarItem } from '../utils/sidebar.js';
+import { dateTimeFormat, elementsAsList } from '../utils/text_format.js';
 import { apiFetch } from '../utils/tumblr_helpers.js';
 import { userBlogs } from '../utils/user.js';
 
@@ -12,29 +13,6 @@ const createTagSpan = tag => dom('span', { class: 'mass-privater-tag' }, null, [
 const createBlogSpan = name => dom('span', { class: 'mass-privater-blog' }, null, [name]);
 const sleep = ms => new Promise(resolve => setTimeout(resolve, ms));
 
-const dateTimeFormat = new Intl.DateTimeFormat(document.documentElement.lang, {
-  year: 'numeric',
-  month: 'long',
-  day: 'numeric',
-  hour: 'numeric',
-  minute: 'numeric',
-  timeZoneName: 'short'
-});
-
-/**
- * Adds string elements between an array's items to format it as an English prose list.
- * The Oxford comma is included.
- * @param {any[]} array - Input array of any number of items
- * @param {string} andOr - String 'and' or 'or', used before the last item
- * @returns {any[]} An array alternating between the input items and strings
- */
-const elementsAsList = (array, andOr) =>
-  array.flatMap((item, i) => {
-    if (i === array.length - 1) return [item];
-    if (i === array.length - 2) return array.length === 2 ? [item, ` ${andOr} `] : [item, `, ${andOr} `];
-    return [item, ', '];
-  });
-
 const timezoneOffsetMs = new Date().getTimezoneOffset() * 60000;
 
 const createNowString = () => {
diff --git a/src/features/timeformat.js b/src/features/timeformat.js
index 1a6ddd927..b312dbbd1 100644
--- a/src/features/timeformat.js
+++ b/src/features/timeformat.js
@@ -2,36 +2,11 @@ import moment from '../lib/moment.js';
 import { keyToCss } from '../utils/css_map.js';
 import { pageModifications } from '../utils/mutations.js';
 import { getPreferences } from '../utils/preferences.js';
+import { constructRelativeTimeString } from '../utils/text_format.js';
 
 let format;
 let displayRelative;
 
-const relativeTimeFormat = new Intl.RelativeTimeFormat(document.documentElement.lang, { style: 'long' });
-const thresholds = [
-  { unit: 'year', denominator: 31557600 },
-  { unit: 'month', denominator: 2629800 },
-  { unit: 'week', denominator: 604800 },
-  { unit: 'day', denominator: 86400 },
-  { unit: 'hour', denominator: 3600 },
-  { unit: 'minute', denominator: 60 },
-  { unit: 'second', denominator: 1 }
-];
-
-const constructRelativeTimeString = function (unixTime) {
-  const now = Math.trunc(new Date().getTime() / 1000);
-  const unixDiff = unixTime - now;
-  const unixDiffAbsolute = Math.abs(unixDiff);
-
-  for (const { unit, denominator } of thresholds) {
-    if (unixDiffAbsolute >= denominator) {
-      const value = Math.trunc(unixDiff / denominator);
-      return relativeTimeFormat.format(value, unit);
-    }
-  }
-
-  return relativeTimeFormat.format(-0, 'second');
-};
-
 const formatTimeElements = function (timeElements) {
   timeElements.forEach(timeElement => {
     const momentDate = moment(timeElement.dateTime, moment.ISO_8601);
diff --git a/src/features/timestamps.js b/src/features/timestamps.js
index b65d7e792..f444e6844 100644
--- a/src/features/timestamps.js
+++ b/src/features/timestamps.js
@@ -4,6 +4,7 @@ import { apiFetch } from '../utils/tumblr_helpers.js';
 import { onNewPosts } from '../utils/mutations.js';
 import { getPreferences } from '../utils/preferences.js';
 import { keyToCss } from '../utils/css_map.js';
+import { constructRelativeTimeString } from '../utils/text_format.js';
 
 const noteCountSelector = keyToCss('noteCount');
 const reblogHeaderSelector = keyToCss('reblogHeader');
@@ -39,16 +40,6 @@ const longTimeFormat = new Intl.DateTimeFormat(locale, {
   second: '2-digit',
   timeZoneName: 'short'
 });
-const relativeTimeFormat = new Intl.RelativeTimeFormat(locale, { style: 'long' });
-const thresholds = [
-  { unit: 'year', denominator: 31557600 },
-  { unit: 'month', denominator: 2629800 },
-  { unit: 'week', denominator: 604800 },
-  { unit: 'day', denominator: 86400 },
-  { unit: 'hour', denominator: 3600 },
-  { unit: 'minute', denominator: 60 },
-  { unit: 'second', denominator: 1 }
-];
 
 const constructTimeString = function (unixTime) {
   const date = new Date(unixTime * 1000);
@@ -91,21 +82,6 @@ const constructISOString = function (unixTime) {
   return `${fourDigitYear}-${twoDigitMonth}-${twoDigitDate}T${twoDigitHours}:${twoDigitMinutes}:${twoDigitSeconds}${timezoneOffsetIsNegative ? '+' : '-'}${twoDigitTimezoneOffsetHours}:${twoDigitTimezoneOffsetMinutes}`;
 };
 
-const constructRelativeTimeString = function (unixTime) {
-  const now = Math.trunc(new Date().getTime() / 1000);
-  const unixDiff = unixTime - now;
-  const unixDiffAbsolute = Math.abs(unixDiff);
-
-  for (const { unit, denominator } of thresholds) {
-    if (unixDiffAbsolute >= denominator) {
-      const value = Math.trunc(unixDiff / denominator);
-      return relativeTimeFormat.format(value, unit);
-    }
-  }
-
-  return relativeTimeFormat.format(-0, 'second');
-};
-
 const addPostTimestamps = async function () {
   getPostElements({ excludeClass: 'xkit-timestamps-done' }).forEach(async postElement => {
     const { id } = postElement.dataset;
diff --git a/src/utils/text_format.js b/src/utils/text_format.js
new file mode 100644
index 000000000..ecb8774f0
--- /dev/null
+++ b/src/utils/text_format.js
@@ -0,0 +1,48 @@
+const thresholds = [
+  { unit: 'year', denominator: 31557600 },
+  { unit: 'month', denominator: 2629800 },
+  { unit: 'week', denominator: 604800 },
+  { unit: 'day', denominator: 86400 },
+  { unit: 'hour', denominator: 3600 },
+  { unit: 'minute', denominator: 60 },
+  { unit: 'second', denominator: 1 }
+];
+
+const relativeTimeFormat = new Intl.RelativeTimeFormat(document.documentElement.lang, { style: 'long' });
+export const constructRelativeTimeString = function (unixTime) {
+  const now = Math.trunc(new Date().getTime() / 1000);
+  const unixDiff = unixTime - now;
+  const unixDiffAbsolute = Math.abs(unixDiff);
+
+  for (const { unit, denominator } of thresholds) {
+    if (unixDiffAbsolute >= denominator) {
+      const value = Math.trunc(unixDiff / denominator);
+      return relativeTimeFormat.format(value, unit);
+    }
+  }
+
+  return relativeTimeFormat.format(-0, 'second');
+};
+
+export const dateTimeFormat = new Intl.DateTimeFormat(document.documentElement.lang, {
+  year: 'numeric',
+  month: 'long',
+  day: 'numeric',
+  hour: 'numeric',
+  minute: 'numeric',
+  timeZoneName: 'short'
+});
+
+/**
+ * Adds string elements between an array's items to format it as an English prose list.
+ * The Oxford comma is included.
+ * @param {any[]} array - Input array of any number of items
+ * @param {string} andOr - String 'and' or 'or', used before the last item
+ * @returns {any[]} An array alternating between the input items and strings
+ */
+export const elementsAsList = (array, andOr) =>
+  array.flatMap((item, i) => {
+    if (i === array.length - 1) return [item];
+    if (i === array.length - 2) return array.length === 2 ? [item, ` ${andOr} `] : [item, `, ${andOr} `];
+    return [item, ', '];
+  });