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Letters of admission are sent out to students in the EU, EEA and foreign students with German university entrance qualifications ...

For degree programmes with limited admission for the 1st first subject semester
Starting early August
Starting early February
for the subsequent winter semester
for the subsequent summer semester
For degree programmes with limited admission for higher subject semesters
Starting mid-September
Starting mid-March
for the subsequent winter semester
for the subsequent summer semester
For Medicine and Dentistry (hochschulstart.de)
Starting mid-August
Starting mid-February
for the subsequent winter semester
for the subsequent summer semester

Letters of admission are sent out to non-EU or stateless applicants ...
For all degree programmes
Starting June
Starting December
for the subsequent winter semester
for the subsequent summer semester