diff --git a/osu.Game/Graphics/DrawableDate.cs b/osu.Game/Graphics/DrawableDate.cs
index 7a264f58a5..df6aa72c37 100644
--- a/osu.Game/Graphics/DrawableDate.cs
+++ b/osu.Game/Graphics/DrawableDate.cs
@@ -62,6 +62,6 @@ namespace osu.Game.Graphics
 
         private void updateTime() => Format();
 
-        public virtual string TooltipText => string.Format("{0:d MMMM yyyy H:mm \"UTC\"z}", date);
+        public virtual string TooltipText => string.Format($"{date:d MMMM yyyy H:mm \"UTC\"z}");
     }
 }
diff --git a/osu.Game/Graphics/DrawableJoinDate.cs b/osu.Game/Graphics/DrawableJoinDate.cs
index 7860774a69..713bd4e44f 100644
--- a/osu.Game/Graphics/DrawableJoinDate.cs
+++ b/osu.Game/Graphics/DrawableJoinDate.cs
@@ -2,8 +2,6 @@
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
 using System;
-using System.Collections.Generic;
-using System.Text;
 
 namespace osu.Game.Graphics
 {
@@ -16,8 +14,8 @@ namespace osu.Game.Graphics
             this.date = date;
         }
 
-        protected override string Format() => Text = string.Format("{0:MMMM yyyy}", date);
+        protected override string Format() => Text = string.Format($"{date:MMMM yyyy}");
 
-        public override string TooltipText => string.Format("{0:d MMMM yyyy}", date);
+        public override string TooltipText => string.Format($"{date:d MMMM yyyy}");
     }
 }