diff --git a/Dalamud/Interface/ImGuiNotification/Internal/ActiveNotification.ImGui.cs b/Dalamud/Interface/ImGuiNotification/Internal/ActiveNotification.ImGui.cs
index ac10cc060..5d496963d 100644
--- a/Dalamud/Interface/ImGuiNotification/Internal/ActiveNotification.ImGui.cs
+++ b/Dalamud/Interface/ImGuiNotification/Internal/ActiveNotification.ImGui.cs
@@ -2,6 +2,7 @@ using System.Numerics;
 
 using Dalamud.Interface.Internal;
 using Dalamud.Interface.Utility;
+using Dalamud.Utility;
 
 using ImGuiNET;
 
@@ -288,8 +289,8 @@ internal sealed partial class ActiveNotification
             ImGui.PushStyleColor(ImGuiCol.Text, NotificationConstants.WhenTextColor);
             ImGui.TextUnformatted(
                 ImGui.IsWindowHovered(ImGuiHoveredFlags.AllowWhenBlockedByActiveItem)
-                    ? this.CreatedAt.FormatAbsoluteDateTime()
-                    : this.CreatedAt.FormatRelativeDateTime());
+                    ? this.CreatedAt.LocAbsolute()
+                    : this.CreatedAt.LocRelativePastLong());
             ImGui.PopStyleColor();
             ImGui.PopStyleVar();
         }
@@ -304,7 +305,7 @@ internal sealed partial class ActiveNotification
 
             ltOffset.X = height;
 
-            var agoText = this.CreatedAt.FormatRelativeDateTimeShort();
+            var agoText = this.CreatedAt.LocRelativePastShort();
             var agoSize = ImGui.CalcTextSize(agoText);
             rtOffset.X -= agoSize.X;
             ImGui.SetCursorPos(rtOffset with { Y = NotificationConstants.ScaledWindowPadding });
diff --git a/Dalamud/Interface/ImGuiNotification/Internal/NotificationConstants.cs b/Dalamud/Interface/ImGuiNotification/Internal/NotificationConstants.cs
index f88eac53a..50536baa3 100644
--- a/Dalamud/Interface/ImGuiNotification/Internal/NotificationConstants.cs
+++ b/Dalamud/Interface/ImGuiNotification/Internal/NotificationConstants.cs
@@ -1,4 +1,3 @@
-using System.Diagnostics;
 using System.Numerics;
 
 using Dalamud.Interface.Colors;
@@ -91,31 +90,6 @@ internal static class NotificationConstants
     /// <summary>Color for the background progress bar (determinate progress only).</summary>
     public static readonly Vector4 BackgroundProgressColorMin = new(1f, 1f, 1f, 0.05f);
 
-    /// <summary>Gets the relative time format strings.</summary>
-    private static readonly (TimeSpan MinSpan, string? FormatString)[] RelativeFormatStrings =
-    {
-        (TimeSpan.FromDays(7), null),
-        (TimeSpan.FromDays(2), "{0:%d} days ago"),
-        (TimeSpan.FromDays(1), "yesterday"),
-        (TimeSpan.FromHours(2), "{0:%h} hours ago"),
-        (TimeSpan.FromHours(1), "an hour ago"),
-        (TimeSpan.FromMinutes(2), "{0:%m} minutes ago"),
-        (TimeSpan.FromMinutes(1), "a minute ago"),
-        (TimeSpan.FromSeconds(2), "{0:%s} seconds ago"),
-        (TimeSpan.FromSeconds(1), "a second ago"),
-        (TimeSpan.MinValue, "just now"),
-    };
-
-    /// <summary>Gets the relative time format strings.</summary>
-    private static readonly (TimeSpan MinSpan, string FormatString)[] RelativeFormatStringsShort =
-    {
-        (TimeSpan.FromDays(1), "{0:%d}d"),
-        (TimeSpan.FromHours(1), "{0:%h}h"),
-        (TimeSpan.FromMinutes(1), "{0:%m}m"),
-        (TimeSpan.FromSeconds(1), "{0:%s}s"),
-        (TimeSpan.MinValue, "now"),
-    };
-
     /// <summary>Gets the scaled padding of the window (dot(.) in the above diagram).</summary>
     public static float ScaledWindowPadding => MathF.Round(16 * ImGuiHelpers.GlobalScale);
 
@@ -142,46 +116,6 @@ internal static class NotificationConstants
     /// <summary>Gets the string format of the initiator name field, if the initiator is unloaded.</summary>
     public static string UnloadedInitiatorNameFormat => "{0} (unloaded)";
 
-    /// <summary>Formats an instance of <see cref="DateTime"/> as a relative time.</summary>
-    /// <param name="when">When.</param>
-    /// <returns>The formatted string.</returns>
-    public static string FormatRelativeDateTime(this DateTime when)
-    {
-        var ts = DateTime.Now - when;
-        foreach (var (minSpan, formatString) in RelativeFormatStrings)
-        {
-            if (ts < minSpan)
-                continue;
-            if (formatString is null)
-                break;
-            return string.Format(formatString, ts);
-        }
-
-        return when.FormatAbsoluteDateTime();
-    }
-
-    /// <summary>Formats an instance of <see cref="DateTime"/> as an absolute time.</summary>
-    /// <param name="when">When.</param>
-    /// <returns>The formatted string.</returns>
-    public static string FormatAbsoluteDateTime(this DateTime when) => $"{when:G}";
-
-    /// <summary>Formats an instance of <see cref="DateTime"/> as a relative time.</summary>
-    /// <param name="when">When.</param>
-    /// <returns>The formatted string.</returns>
-    public static string FormatRelativeDateTimeShort(this DateTime when)
-    {
-        var ts = DateTime.Now - when;
-        foreach (var (minSpan, formatString) in RelativeFormatStringsShort)
-        {
-            if (ts < minSpan)
-                continue;
-            return string.Format(formatString, ts);
-        }
-
-        Debug.Assert(false, "must not reach here");
-        return "???";
-    }
-
     /// <summary>Gets the color corresponding to the notification type.</summary>
     /// <param name="type">The notification type.</param>
     /// <returns>The corresponding color.</returns>
diff --git a/Dalamud/Localization.cs b/Dalamud/Localization.cs
index b180f113a..39312ac52 100644
--- a/Dalamud/Localization.cs
+++ b/Dalamud/Localization.cs
@@ -36,6 +36,7 @@ public class Localization : IServiceType
     /// <param name="useEmbedded">Use embedded loc resource files.</param>
     public Localization(string locResourceDirectory, string locResourcePrefix = "", bool useEmbedded = false)
     {
+        this.DalamudLanguageCultureInfo = CultureInfo.InvariantCulture;
         this.locResourceDirectory = locResourceDirectory;
         this.locResourcePrefix = locResourcePrefix;
         this.useEmbedded = useEmbedded;
@@ -61,7 +62,24 @@ public class Localization : IServiceType
     /// <summary>
     /// Event that occurs when the language is changed.
     /// </summary>
-    public event LocalizationChangedDelegate LocalizationChanged;
+    public event LocalizationChangedDelegate? LocalizationChanged;
+
+    /// <summary>
+    /// Gets an instance of <see cref="CultureInfo"/> that corresponds to the language configured from Dalamud Settings.
+    /// </summary>
+    public CultureInfo DalamudLanguageCultureInfo { get; private set; }
+
+    /// <summary>
+    /// Gets an instance of <see cref="CultureInfo"/> that corresponds to <paramref cref="langCode"/>.
+    /// </summary>
+    /// <param name="langCode">The language code which should be in <see cref="ApplicableLangCodes"/>.</param>
+    /// <returns>The corresponding instance of <see cref="CultureInfo"/>.</returns>
+    public static CultureInfo GetCultureInfoFromLangCode(string langCode) =>
+        CultureInfo.GetCultureInfo(langCode switch
+        {
+            "tw" => "zh-tw",
+            _ => langCode,
+        });
 
     /// <summary>
     /// Search the set-up localization data for the provided assembly for the given string key and return it.
@@ -108,6 +126,7 @@ public class Localization : IServiceType
     /// </summary>
     public void SetupWithFallbacks()
     {
+        this.DalamudLanguageCultureInfo = CultureInfo.InvariantCulture;
         this.LocalizationChanged?.Invoke(FallbackLangCode);
         Loc.SetupWithFallbacks(this.assembly);
     }
@@ -124,6 +143,7 @@ public class Localization : IServiceType
             return;
         }
 
+        this.DalamudLanguageCultureInfo = GetCultureInfoFromLangCode(langCode);
         this.LocalizationChanged?.Invoke(langCode);
 
         try
diff --git a/Dalamud/Utility/DateTimeSpanExtensions.cs b/Dalamud/Utility/DateTimeSpanExtensions.cs
new file mode 100644
index 000000000..8f6a2a7ec
--- /dev/null
+++ b/Dalamud/Utility/DateTimeSpanExtensions.cs
@@ -0,0 +1,129 @@
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Globalization;
+
+using CheapLoc;
+
+using Dalamud.Logging.Internal;
+
+namespace Dalamud.Utility;
+
+/// <summary>
+/// Utility functions for <see cref="DateTime"/> and <see cref="TimeSpan"/>.
+/// </summary>
+internal static class DateTimeSpanExtensions
+{
+    private static readonly ModuleLog Log = new(nameof(DateTimeSpanExtensions));
+
+    private static ParsedRelativeFormatStrings? relativeFormatStringLong;
+
+    private static ParsedRelativeFormatStrings? relativeFormatStringShort;
+
+    /// <summary>Formats an instance of <see cref="DateTime"/> as a localized absolute time.</summary>
+    /// <param name="when">When.</param>
+    /// <returns>The formatted string.</returns>
+    /// <remarks>The string will be formatted according to Square Enix Account region settings, if Dalamud default
+    /// language is English.</remarks>
+    public static unsafe string LocAbsolute(this DateTime when)
+    {
+        var culture = Service<Localization>.GetNullable()?.DalamudLanguageCultureInfo ?? CultureInfo.InvariantCulture;
+        if (!Equals(culture, CultureInfo.InvariantCulture))
+            return when.ToString("G", culture);
+
+        var framework = FFXIVClientStructs.FFXIV.Client.System.Framework.Framework.Instance();
+        var region = 0;
+        if (framework is not null)
+            region = framework->Region;
+        switch (region)
+        {
+            case 0: // jp
+            default:
+                return when.ToString("yyyy-MM-dd HH:mm:ss");
+            case 1: // na
+                return when.ToString("MM/dd/yyyy HH:mm:ss");
+            case 2: // eu
+                return when.ToString("dd-mm-yyyy HH:mm:ss");
+        }
+    }
+
+    /// <summary>Formats an instance of <see cref="DateTime"/> as a localized relative time.</summary>
+    /// <param name="when">When.</param>
+    /// <returns>The formatted string.</returns>
+    public static string LocRelativePastLong(this DateTime when)
+    {
+        var loc = Loc.Localize(
+            "DateTimeSpanExtensions.RelativeFormatStringsLong",
+            "172800,{0:%d} days ago\n86400,yesterday\n7200,{0:%h} hours ago\n3600,an hour ago\n120,{0:%m} minutes ago\n60,a minute ago\n2,{0:%s} seconds ago\n1,a second ago\n-Infinity,just now");
+        Debug.Assert(loc != null, "loc != null");
+
+        if (relativeFormatStringLong?.FormatStringLoc != loc)
+            relativeFormatStringLong ??= new(loc);
+
+        return relativeFormatStringLong.Format(DateTime.Now - when);
+    }
+
+    /// <summary>Formats an instance of <see cref="DateTime"/> as a localized relative time.</summary>
+    /// <param name="when">When.</param>
+    /// <returns>The formatted string.</returns>
+    public static string LocRelativePastShort(this DateTime when)
+    {
+        var loc = Loc.Localize(
+            "DateTimeSpanExtensions.RelativeFormatStringsShort",
+            "86400,{0:%d}d\n3600,{0:%h}h\n60,{0:%m}m\n1,{0:%s}s\n-Infinity,now");
+        Debug.Assert(loc != null, "loc != null");
+
+        if (relativeFormatStringShort?.FormatStringLoc != loc)
+            relativeFormatStringShort = new(loc);
+
+        return relativeFormatStringShort.Format(DateTime.Now - when);
+    }
+
+    private sealed class ParsedRelativeFormatStrings
+    {
+        private readonly List<(float MinSeconds, string FormatString)> formatStrings = new();
+
+        public ParsedRelativeFormatStrings(string value)
+        {
+            this.FormatStringLoc = value;
+            foreach (var line in value.Split("\n"))
+            {
+                var sep = line.IndexOf(',');
+                if (sep < 0)
+                {
+                    Log.Error("A line without comma has been found: {line}", line);
+                    continue;
+                }
+
+                if (!float.TryParse(
+                        line.AsSpan(0, sep),
+                        NumberStyles.Float,
+                        CultureInfo.InvariantCulture,
+                        out var seconds))
+                {
+                    Log.Error("Could not parse the duration: {line}", line);
+                    continue;
+                }
+
+                this.formatStrings.Add((seconds, line[(sep + 1)..]));
+            }
+
+            this.formatStrings.Sort((a, b) => b.MinSeconds.CompareTo(a.MinSeconds));
+        }
+
+        public string FormatStringLoc { get; }
+
+        /// <summary>Formats an instance of <see cref="TimeSpan"/> as a localized string.</summary>
+        /// <param name="ts">The duration.</param>
+        /// <returns>The formatted string.</returns>
+        public string Format(TimeSpan ts)
+        {
+            foreach (var (minSeconds, formatString) in this.formatStrings)
+            {
+                if (ts.TotalSeconds >= minSeconds)
+                    return string.Format(formatString, ts);
+            }
+
+            return this.formatStrings[^1].FormatString.Format(ts);
+        }
+    }
+}