The application deadline for German universities is usually mid-July for the winter semester (which starts in October) and mid-January for the summer semester (starting in April). However, it is advisable to begin the application process as early as possible because some programs may have earlier deadlines. It is also essential to allow enough time to prepare all the required documents and arrange for any necessary visas. So, if you're interested in studying in Germany, be sure to start the application process early.