--- a/handler_remind.go	Sun Dec 11 15:55:43 2016 +0100
+++ b/handler_remind.go	Sun Dec 11 20:11:08 2016 +0100
@@ -126,6 +126,10 @@
 		return listReminders(ctx, msg.Chat.ID)
 	}
 
+	// saving the time here, before alert time calculation, so "+10m" will be displayed as such, not as "0:09" because
+	// it technically is 9.999999 minutes.
+	now := time.Now()
+
 	// restStart is the index of the first character of the remaining text
 	alertTime, restStart := parseReminderString(strings.Trim(msg.Text, " "))
 
@@ -155,9 +159,9 @@
 		return replyContent{text: "_Ich konnte leider keine Erinnerung setzen._"}, nil
 	}
 
-	remaining := alertTime.Sub(time.Now())
+	remaining := alertTime.Sub(now)
 	hours := uint64(remaining.Seconds()) / 3600
-	minutes := (uint64(remaining.Seconds()) % 3600) / 60
+	minutes := (uint64(remaining.Seconds()+1) % 3600) / 60
 	return replyContent{text: fmt.Sprintf("*✓* Erinnerung #%d in %d:%02d", id, hours, minutes)}, nil
 }