diff --git a/src/main.rs b/src/main.rs
index 19be4f5..0d30c9b 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -81,7 +81,7 @@ mod test_save_load {
 }
 
 impl TSheet {
-   fn from(&self, t: SystemTime) -> TSheet {
+   fn since(&self, t: SystemTime) -> TSheet {
       let mut result = TSheet{xs: vec![]};
       self.xs.iter()
          .filter(|x| x.ts() >= t)
@@ -101,7 +101,7 @@ mod test_tsheet {
    use super::*;
 
    #[test]
-   fn test_tsheet_from_date() {
+   fn test_tsheet_since_date() {
       let given = TSheet{xs: vec![
          X{t: 1, x: "def".to_string(), tag: "abc".to_string()},
          X{t: 2, x: "ghi".to_string(), tag: "".to_string()},
@@ -111,7 +111,7 @@ mod test_tsheet {
          X{t: 2, x: "ghi".to_string(), tag: "".to_string()},
          X{t: 3, x: "jkl".to_string(), tag: "".to_string()},
       ]};
-      let got = given.from(UNIX_EPOCH.add(Duration::from_secs(2)));
+      let got = given.since(UNIX_EPOCH.add(Duration::from_secs(2)));
       assert_eq!(got, want);
    }
 }