\documentclass[a5paper,7pt]{scrreprt}
\usepackage[default]{opensans}
\usepackage[margin=0.55cm,landscape]{geometry}
% \usepackage[height=25cm]{geometry}
\usepackage{timetable}
\usepackage{transparent}
\usepackage{amssymb}
\usepackage{enumitem}
\usepackage{pifont}
\newcommand{\wontfix}{\rlap{$\square$}{\large\hspace{1pt}\xmark}}

\begin{document}
\thispagestyle{empty}
% \begin{landscape}

% Define the layout of your time tables
\setslotsize{3.00cm}{0.25cm}
\setslotcount{6}{52}
\settopheight{2}
\settextframe{0.8mm}

% Retro
\setframetype[t]{1}
\seteventcornerradius{0pt}

% Print timestamps into event blocks
% \setprinttimestamps{2}

% Define event types
%background  foreground

\defineevent{pr}{0.69}{0.11}{0.20}{1.0}{1.0}{1.0}% rot
\defineevent{other}{0.0}{0.47}{0.3}{1.0}{1.0}{1.0}% dunkelgrün
\defineevent{extern}{0.77}{0.56}{0.05}{1.0}{1.0}{1.0}
\defineevent{stream}{0.09}{0.45}{0.56}{1.0}{1.0}{1.0}% petrol

% Start the timetable
\begin{center}
\begin{timetable}
  \hours{8}{15}{0}
  \germandays{1}
  \event 1 {0900}{0930}{Anreise}{}{}{}{pr}{0}
  \event 1 {0930}{1030}{Eröffnungsstream}{}{}{}{stream}{0}
  \event 1 {1030}{1230}{Tutorien}{}{APB/Online}{}{pr}{0}
  \event 1 {1230}{1400}{Mittagessen}{}{Mensa}{}{pr}{0}
  \event 1 {1430}{1800}{Bunter Nachmittag}{}{APB/Online}{}{pr}{0}
  \event 1 {1830}{2100}{Spieleabend\\international}{}{APB}{}{pr}{0}


  \event 2 {0900}{1200}{Einschrei-\\bung}{}{}{1}{stream}{0}
  \event 2 {0900}{1200}{Spaßstream}{}{}{1}{stream}{2}
  \event 2 {1230}{1400}{Vortrag zum Studium}{}{}{}{stream}{0}
  \event 2 {1500}{1700}{Campusschnitzeljagd}{}{}{}{stream}{0}
  \event 2 {1800}{2100}{Clubwanderung}{}{Countdown}{}{pr}{0}

  \event 3 {0900}{1700}{Wanderung}{}{siehe Website}{}{pr}{0}
  \event 3 {1800}{2100}{Spielabend}{}{APB}{}{pr}{0}


  \event 4 {0900}{1030}{Vortrag\\Sprachkurse}{}{}{}{stream}{0}
  \event 4 {1030}{1300}{Vorstellung der\\Lehrenden}{}{}{}{stream}{0}
  \event 4 {1600}{1800}{Feierliche\\Immatri-\\kulation}{}{}{0}{extern}{1}
  \event 4 {1330}{1630}{Nerd::101}{}{}{1}{stream}{2}
  \event 4 {1800}{2100}{Spielabend \&\\Kino}{}{APB}{}{pr}{0}

  \event 5 {0900}{1300}{Seminargruppen}{}{siehe Plan}{}{stream}{0}
  \event 5 {1300}{1400}{Vorträge zum FSR \&\\Auslandsstudium}{}{}{}{stream}{0}
%  \event 5 {1500}{1700}{ESE Spiel}{}{APB/E023}{}{pr}{0}
  \event 5 {1400}{1500}{Abschlussstream}{}{}{}{stream}{0}
  \event 5 {1900}{2100}{Neustadt-\\kneipentour}{}{Albertplatz}{}{pr}{0}
  
  \event 6 {0900}{2100}{Stadtführung}{}{siehe Website}{}{pr}{0}
\end{timetable}
\end{center}
% \end{landscape}
\end{document}