diff --git a/AK/Time.cpp b/AK/Time.cpp
index d10340e5978..ff84eb51727 100644
--- a/AK/Time.cpp
+++ b/AK/Time.cpp
@@ -1,5 +1,6 @@
 /*
  * Copyright (c) 2020, the SerenityOS developers.
+ * Copyright (c) 2025, Shannon Booth <shannon@serenityos.org>
  *
  * SPDX-License-Identifier: BSD-2-Clause
  */
@@ -271,6 +272,27 @@ MonotonicTime MonotonicTime::now_coarse()
     return MonotonicTime { now_time_from_clock(CLOCK_MONOTONIC_COARSE) };
 }
 
+UnixDateTime UnixDateTime::from_iso8601_week(u32 week_year, u32 week)
+{
+    auto january_1_weekday = day_of_week(week_year, 1, 1);
+    i32 offset_to_monday = (january_1_weekday <= 3) ? -january_1_weekday : 7 - january_1_weekday;
+    i32 first_monday_of_year = 1 + offset_to_monday;
+    i32 day_of_year = (first_monday_of_year + (week - 1) * 7) + 1;
+
+    // FIXME: There should be a more efficient way to do this that doesn't require a loop.
+    u8 month = 1;
+    while (true) {
+        auto days = days_in_month(week_year, month);
+        if (day_of_year <= days)
+            break;
+
+        day_of_year -= days;
+        ++month;
+    }
+
+    return UnixDateTime::from_unix_time_parts(week_year, month, static_cast<u8>(day_of_year), 0, 0, 0, 0);
+}
+
 UnixDateTime UnixDateTime::now()
 {
     return UnixDateTime { now_time_from_clock(CLOCK_REALTIME) };
diff --git a/AK/Time.h b/AK/Time.h
index 718290a42ce..83d20099004 100644
--- a/AK/Time.h
+++ b/AK/Time.h
@@ -379,6 +379,9 @@ public:
         return UnixDateTime {};
     }
 
+    // Creates UNIX time from an ISO 8601 Week, such as 2025-W06, with year 2025 and week 6.
+    [[nodiscard]] static UnixDateTime from_iso8601_week(u32 year, u32 week);
+
     // Creates UNIX time from a unix timestamp.
     // Note that the returned time is probably not equivalent to the same timestamp in UTC time, since UNIX time does not observe leap seconds.
     [[nodiscard]] constexpr static UnixDateTime from_unix_time_parts(i32 year, u8 month, u8 day, u8 hour, u8 minute, u8 second, u16 millisecond)