diff --git a/inc/api.php b/inc/api.php
index 55daf73..ba3ec2f 100644
--- a/inc/api.php
+++ b/inc/api.php
@@ -69,18 +69,51 @@
       $stop = $gtfs->getStop($_GET["stop"]);
       $times = $gtfs->getStopTimes($_GET["stop"]);
 
+      $todayTimestamp = (new DateTime("today"))->getTimestamp();
+      $nowTimestamp = (new DateTime("now"))->getTimestamp();
+
       $schedules = [];
       $routes = [];
       foreach ($times as $time) {
         if ($time["trip_headsign"] == $stop["stop_name"]) continue;
-        $schedules[] = [
+
+        if ($time["date"]) {
+          // In this case the train was specifically scheduled for this date,
+          // so we are given the exact date.
+          $date = new DateTime($time["date"]);
+          $arrivalTime = gtfs::time2seconds($time["arrival_time"], false);
+          $departureTime = gtfs::time2seconds($time["departure_time"], false);
+          while ($departureTime >= 24*60*60) {
+            $arrivalTime -= 24*60*60;
+            $departureTime -= 24*60*60;
+            $date->add(new DateInterval("P1D"));
+          }
+
+          $dayTimestamp = $date->getTimestamp();
+        } else {
+          // In this case the train was scheduled several days, so we'll check
+          // whether the train has already passed today (in which case it will
+          // pass tomorrow) or it hasn't (in which case it will pass today).
+          $arrivalTime = gtfs::time2seconds($time["arrival_time"], true);
+          $departureTime = gtfs::time2seconds($time["departure_time"], true);
+          if ($todayTimestamp + $departureTime >= $nowTimestamp)
+            $dayTimestamp = $todayTimestamp;
+          else
+            $dayTimestamp = $todayTimestamp->add(new DateInterval("P1D"));
+        }
+
+        $schedule = [
           "destination" => $time["trip_headsign"],
-          "arrivalTime" => gtfs::time2seconds($time["arrival_time"]),
-          "departureTime" => gtfs::time2seconds($time["departure_time"]),
+          "arrivalTime" => $dayTimestamp + $arrivalTime,
+          "departureTime" => $dayTimestamp + $departureTime,
           "route" => self::transformRouteShortName($time["route_short_name"]),
           "color" => $time["route_color"],
           "textColor" => $time["route_text_color"]
         ];
+        if (isset($_GET["includeSqlRows"]))
+          $schedule["originalSqlRow"] = $time;
+
+        $schedules[] = $schedule;
 
         if (!in_array($time["route_short_name"], $routes)) $routes[] = $time["route_short_name"];
       }
diff --git a/inc/gtfs.php b/inc/gtfs.php
index ae33d50..c774ad3 100644
--- a/inc/gtfs.php
+++ b/inc/gtfs.php
@@ -25,13 +25,18 @@
     return date("Ymd");
   }
 
-  static function time2seconds($time) {
+  // Converts a time in the format "HH:MM:SS" to the number of seconds. If
+  // |uniqueRepresentative| is true, when HH >= 24, a representative between 0
+  // and 24*60*60 - 1 of the equivalence class mod 24*60*60 will be returned
+  // instead of returning a number >= 24*60*60.
+  static function time2seconds($time, $uniqueRepresentative=true) {
     $timeSinceMidnight = self::timeSinceMidnight();
 
     $boom = explode(":", $time);
     if (count($boom) != 3) return null;
 
-    return ((($boom[0]*60) + $boom[1])*60 + $boom[2]) % (24*60*60);
+    $seconds = (($boom[0]*60) + $boom[1])*60 + $boom[2];
+    return $uniqueRepresentative ? $seconds % (24*60*60) : $seconds;
   }
 
   private function fetchAll($sql) {
@@ -104,9 +109,11 @@
     $stopParameters = array_keys($values);
 
     $rdow = (int)(new DateTime("now"))->format("w");
+    $dow0 = self::$dow[($rdow - 1) % 7]; // Yesterday's day of week
     $dow = self::$dow[$rdow]; // Today's day of week
     $dow2 = self::$dow[($rdow + 1) % 7]; // Tomorrow's day of week
 
+    $values[":yesterday"] = (int)(new DateTime("yesterday"))->format("Ymd"); // Yesterday's date
     $values[":today"] = (int)(new DateTime("now"))->format("Ymd"); // Today's date
     $values[":tomorrow"] = (int)(new DateTime("tomorrow"))->format("Ymd"); // Tomorrow's date
     $values[":now"] = (new DateTime("now"))->format("H:i:s");
@@ -138,7 +145,7 @@
             ) OR
             (
               time(:now) >= time('00:00:00', '-".(int)$timeLimit." minutes') AND
-              st.departure_time BETWEEN time(:now) AND strftime('24:%M:%S', :now, '".(int)$timeLimit." minutes')
+              st.departure_time BETWEEN time(:now) AND ((strftime('%H', :now, '".(int)$timeLimit." minutes') + 24) || strftime(':%M:%S', :now, '".(int)$timeLimit." minutes'))
             )
           ) AND
           (
@@ -162,12 +169,28 @@
             ) OR
             (
               time(:now) >= time('00:00:00', '-".(int)$timeLimit." minutes') AND
-              st.departure_time BETWEEN time(:now) AND strftime('24:%M:%S', :now, '".(int)$timeLimit." minutes')
+              st.departure_time BETWEEN ((strftime('%H', :now) + 24) || strftime(':%M:%S', :now)) AND ((strftime('%H', :now, '".(int)$timeLimit." minutes') + 48) || strftime(':%M:%S', :now, '".(int)$timeLimit." minutes'))
             )
           ) AND
           (
             c.service_id IS NULL OR
             (
+              c.start_date <= :yesterday AND
+              c.end_date >= :yesterday AND
+              c.$dow0 = ".(int)Gtfs\Calendar\CalendarDay::AVAILABLE."
+            )
+          ) AND
+          (
+            cd.service_id IS NULL OR
+            cd.date = :yesterday
+          )
+        ) OR
+        (
+          time(:now) >= time('00:00:00', '-".(int)$timeLimit." minutes') AND
+          st.departure_time BETWEEN time('00:00:00') AND time(:now, '".(int)$timeLimit." minutes') AND
+          (
+            c.service_id IS NULL OR
+            (
               c.start_date <= :tomorrow AND
               c.end_date >= :tomorrow AND
               c.$dow2 = ".(int)Gtfs\Calendar\CalendarDay::AVAILABLE."
diff --git a/js/views/l9n.js b/js/views/l9n.js
index 1e0e7f4..ae61c75 100644
--- a/js/views/l9n.js
+++ b/js/views/l9n.js
@@ -1,7 +1,3 @@
-Number.prototype.mod = function(n) {
-  return ((this % n) + n) % n;
-}
-
 var scheduleController = {
   maxSchedules: 6,
   recommendedSchedulesPerLine: 2,
@@ -40,28 +36,9 @@
   removeDummy: function() {
     document.getElementById("trains").innerHTML = "";
   },
-  timeSinceMidnight: function() {
-    var now = new Date();
-    var then = new Date(
-      now.getFullYear(),
-      now.getMonth(),
-      now.getDate(),
-      0,0,0);
-    return Math.floor((now.getTime() - then.getTime())/1000);
-  },
   getTime: function() {
     return Math.floor((new Date()).getTime()/1000);
   },
-  timeSinceMidnightInverse: function(sec) {
-    var now = new Date();
-    var today = new Date(
-      now.getFullYear(),
-      now.getMonth(),
-      now.getDate(),
-      0,0,0);
-
-    return Math.floor(today.getTime()/1000) + sec;
-  },
   prettyTime: function(seconds, detailed = true) {
     if (detailed) return (Math.floor(seconds/60)).toString().padStart(2, '0')+":"+(seconds % 60).toString().padStart(2, '0');
     return Math.floor(seconds/60)+"min";
@@ -92,14 +69,13 @@
     trains.appendChild(train);
 
     data._element = time;
-    data._removeAtTime = scheduleController.timeSinceMidnightInverse(data.departureTime);
     scheduleController._times.push(data);
   },
   addTime: function(data) {
     if (data.departureTime > scheduleController._lastTime) {
       scheduleController._lastTime = data.departureTime;
       scheduleController._lastDestinations = [data.destination];
-    } else if (data.departureTime == scheduleController.lastTime) {
+    } else if (data.departureTime == scheduleController._lastTime) {
       var flag = false;
       scheduleController._lastDestinations.forEach(dest => {
         if (data.destination == dest) flag = true;
@@ -134,14 +110,13 @@
     setTimeout(scheduleController.fetchTimes, scheduleController.fetchInterval);
   },
   timer: function() {
-    var timeSinceMidnight = scheduleController.timeSinceMidnight();
-    var time = scheduleController.getTime();
+    var now = scheduleController.getTime();
 
     var removed = 0;
     for (var i = 0;; ++i) {
       if (scheduleController._times[i - removed] === undefined) break;
 
-      if (scheduleController._times[i - removed]._removeAtTime < time) {
+      if (scheduleController._times[i - removed].departureTime < now) {
         scheduleController.removeElement(scheduleController._times[i - removed]._element.parentNode);
         scheduleController._times.shift();
         ++removed;
@@ -156,7 +131,7 @@
 
     var i = 0;
     scheduleController._times.forEach(time => {
-      var diff = (time.departureTime - timeSinceMidnight).mod(24*60*60);
+      var diff = time.departureTime - now;
 
       time._element.textContent = scheduleController.prettyTime(diff, scheduleController.isDetailed(i));