manual changes

functions.php

@@ -839,12 +839,17 @@ function roundToNearest15($time)
 
     // Convert everything to seconds for easier calculation
     $totalSeconds = ($hours * 3600) + ($minutes * 60) + $seconds;
+    
+    // Minimum half hour
+    if ($totalSeconds < 1800) {
+    	$totalSeconds = 1800;
+    }
 
-    // Calculate the remainder when divided by 900 seconds (15 minutes)
-    $remainder = $totalSeconds % 900;
+    // Calculate the remainder when divided by 1800 seconds (30 minutes)
+    $remainder = $totalSeconds % 1800;
 
-    if ($remainder > 450) {  // If remainder is more than 7.5 minutes (450 seconds), round up
-        $totalSeconds += (900 - $remainder);
+    if ($remainder > 900) {  // If remainder is more than 15 minutes (900 seconds), round up
+        $totalSeconds += (1800 - $remainder);
     } else {  // Else round down
         $totalSeconds -= $remainder;
     }