diff --git a/Meta/Lagom/Tools/CodeGenerators/LibUnicode/GenerateUnicodeDateTimeFormat.cpp b/Meta/Lagom/Tools/CodeGenerators/LibUnicode/GenerateUnicodeDateTimeFormat.cpp
index 0a42c0502e..0166e51fe5 100644
--- a/Meta/Lagom/Tools/CodeGenerators/LibUnicode/GenerateUnicodeDateTimeFormat.cpp
+++ b/Meta/Lagom/Tools/CodeGenerators/LibUnicode/GenerateUnicodeDateTimeFormat.cpp
@@ -913,13 +913,13 @@ static void parse_calendar_symbols(Calendar& calendar, JsonObject const& calenda
             else if (key == "pm"sv)
                 symbols[to_underlying(Unicode::DayPeriod::PM)] = locale_data.unique_strings.ensure(move(symbol));
             else if (key == "morning1"sv)
-                symbols[to_underlying(Unicode::DayPeriod::Morning)] = locale_data.unique_strings.ensure(move(symbol));
+                symbols[to_underlying(Unicode::DayPeriod::Morning1)] = locale_data.unique_strings.ensure(move(symbol));
             else if (key == "afternoon1"sv)
-                symbols[to_underlying(Unicode::DayPeriod::Afternoon)] = locale_data.unique_strings.ensure(move(symbol));
+                symbols[to_underlying(Unicode::DayPeriod::Afternoon1)] = locale_data.unique_strings.ensure(move(symbol));
             else if (key == "evening1"sv)
-                symbols[to_underlying(Unicode::DayPeriod::Evening)] = locale_data.unique_strings.ensure(move(symbol));
+                symbols[to_underlying(Unicode::DayPeriod::Evening1)] = locale_data.unique_strings.ensure(move(symbol));
             else if (key == "night1"sv)
-                symbols[to_underlying(Unicode::DayPeriod::Night)] = locale_data.unique_strings.ensure(move(symbol));
+                symbols[to_underlying(Unicode::DayPeriod::Night1)] = locale_data.unique_strings.ensure(move(symbol));
         };
 
         narrow_symbols.for_each_member([&](auto const& key, JsonValue const& value) {
diff --git a/Userland/Libraries/LibJS/Runtime/Intl/DateTimeFormat.cpp b/Userland/Libraries/LibJS/Runtime/Intl/DateTimeFormat.cpp
index 8abf7e1135..4144976733 100644
--- a/Userland/Libraries/LibJS/Runtime/Intl/DateTimeFormat.cpp
+++ b/Userland/Libraries/LibJS/Runtime/Intl/DateTimeFormat.cpp
@@ -760,12 +760,12 @@ static Optional<StringView> day_period_for_hour(StringView locale, StringView ca
     // FIXME: This isn't locale-aware. We should parse the CLDR's cldr-core/supplemental/dayPeriods.json file
     //        to acquire day periods per-locale. For now, these are hard-coded to the en locale's values.
     if ((hour >= 6) && (hour < 12))
-        return Unicode::get_calendar_day_period_symbol(locale, calendar, style, Unicode::DayPeriod::Morning);
+        return Unicode::get_calendar_day_period_symbol(locale, calendar, style, Unicode::DayPeriod::Morning1);
     if ((hour >= 12) && (hour < 18))
-        return Unicode::get_calendar_day_period_symbol(locale, calendar, style, Unicode::DayPeriod::Afternoon);
+        return Unicode::get_calendar_day_period_symbol(locale, calendar, style, Unicode::DayPeriod::Afternoon1);
     if ((hour >= 18) && (hour < 21))
-        return Unicode::get_calendar_day_period_symbol(locale, calendar, style, Unicode::DayPeriod::Evening);
-    return Unicode::get_calendar_day_period_symbol(locale, calendar, style, Unicode::DayPeriod::Night);
+        return Unicode::get_calendar_day_period_symbol(locale, calendar, style, Unicode::DayPeriod::Evening1);
+    return Unicode::get_calendar_day_period_symbol(locale, calendar, style, Unicode::DayPeriod::Night1);
 }
 
 // 11.1.7 FormatDateTimePattern ( dateTimeFormat, patternParts, x, rangeFormatOptions ), https://tc39.es/ecma402/#sec-formatdatetimepattern
diff --git a/Userland/Libraries/LibUnicode/DateTimeFormat.h b/Userland/Libraries/LibUnicode/DateTimeFormat.h
index f92bb96b81..b3fdeaa276 100644
--- a/Userland/Libraries/LibUnicode/DateTimeFormat.h
+++ b/Userland/Libraries/LibUnicode/DateTimeFormat.h
@@ -48,10 +48,10 @@ enum class Weekday : u8 {
 enum class DayPeriod : u8 {
     AM,
     PM,
-    Morning,
-    Afternoon,
-    Evening,
-    Night,
+    Morning1,
+    Afternoon1,
+    Evening1,
+    Night1,
 };
 
 enum class HourCycle : u8 {