The term DER ALTE is a German phrase meaning 'the old one'. It is often used to refer to an elderly person, or someone who is experienced in a particular field. The term TAG is also a German word, meaning 'DAY'. It is commonly used to refer to a specific DAY or time period. Together, the two words form the phrase 'der alte TAG', which translates to 'the old DAY'. This phrase is often used to refer to a time in the past, or a nostalgic memory.