diff --git a/scripts/treno b/scripts/treno
index bc5a325..f6dc4c5 100755
--- a/scripts/treno
+++ b/scripts/treno
@@ -118,18 +118,9 @@ EOF
   def green($x):  "\u001B[1;32m\($x)\u001B[0m";
   def blue($x):   "\u001B[1;34m\($x)\u001B[0m";
 
-  def parse_iso8601:
-    # Parse an ISO 8601 date with timezone information
-    capture("(?<no_tz>[^.]*)(?<frac_sec>\\.\\d+)?(?:(?:(?<tz_sgn>[-+])(?<tz_hr>\\d{2}):?(?<tz_min>\\d{2})?)|Z)$") |
-    (.no_tz + "Z" | fromdateiso8601)
-    + ("0"+.frac_sec | tonumber)
-    - (.tz_sgn + "60" | tonumber)
-    * ((.tz_hr // "0" | tonumber) * 60 + (.tz_min // "0" | tonumber))
-    | todateiso8601 | strptime("%FT%TZ");
-
   def time:
     # Extracts "HH:MM" from a timestamp
-    parse_iso8601 | mktime | strftime("%R");
+    match("T([0-9]+:[0-9]+)"; null) | .captures[0].string;
 
   def delta($stop; $start):
     # Computes the time elapsed between two dates