diff --git a/src/main.rs b/src/main.rs
index 498de9a..62a9afa 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -138,30 +138,23 @@ async fn main() -> Result<()> {
                     .open(&output)
                     .with_context(|| format!("Failed to create {}", output))?;
                 file.write(format!("# {}\n\n", day.end.format("%Y-%m-%d")).as_bytes())?;
-                // TODO extract into a more general function
-                let week_ago = day.end - Duration::days(7);
-                // TODO check if the file exists
+
+                // TODO move to separate function
+                file.write(create_back_link(&day.end, "[One week ago](diary:{})\n", 7).as_bytes())?;
                 file.write(
-                    format!("[One week ago](diary:{})\n", week_ago.format("%Y-%m-%d")).as_bytes(),
+                    create_back_link(&day.end, "[One month ago](diary:{})\n", 30).as_bytes(),
                 )?;
-                let month_ago = day.end - Duration::days(30);
-                // TODO check if the file exists
                 file.write(
-                    format!("[One month ago](diary:{})\n", month_ago.format("%Y-%m-%d")).as_bytes(),
+                    create_back_link(&day.end, "[Six months ago](diary:{})\n", 6 * 30).as_bytes(),
                 )?;
-                let half_year_ago = day.end - Duration::days(6 * 30);
-                // TODO check if the file exists
                 file.write(
-                    format!(
-                        "[Six months ago](diary:{})\n",
-                        half_year_ago.format("%Y-%m-%d")
-                    )
-                    .as_bytes(),
+                    create_back_link(&day.end, "[One year ago](diary:{})\n", 365).as_bytes(),
                 )?;
-                let year_ago = day.end - Duration::days(365);
-                // TODO check if the file exists
                 file.write(
-                    format!("[One year ago](diary:{})\n", year_ago.format("%Y-%m-%d")).as_bytes(),
+                    create_back_link(&day.end, "[Two years ago](diary:{})\n", 365 * 2).as_bytes(),
+                )?;
+                file.write(
+                    create_back_link(&day.end, "[Three years ago](diary:{})\n", 365 * 3).as_bytes(),
                 )?;
                 file
             }
@@ -175,6 +168,16 @@ async fn main() -> Result<()> {
     Ok(())
 }
 
+fn create_back_link(day_end: &DateTime<Local>, anchor_text: &str, ago: i64) -> String {
+    let prior_date = *day_end - Duration::days(ago);
+    // TODO check if the file exists
+    format!(
+        "[{}](diary:{})\n",
+        anchor_text,
+        prior_date.format("%Y-%m-%d")
+    )
+}
+
 enum NextIter {
     Skip,
     Stop,