Here's why:
* Nouns in German are capitalized only when they are used at the beginning of a sentence or as part of a proper noun.
* "Tag" is a common noun, referring to the general concept of a day.
Therefore, you would write:
* "Heute ist ein schöner Tag." (Today is a beautiful day.)
* "Der Tag hat 24 Stunden." (The day has 24 hours.)
However, there are some exceptions:
* When "Tag" is part of a specific, proper noun, it would be capitalized. For example, "Tag der Deutschen Einheit" (Day of German Unity).
Let me know if you have any other questions about German grammar! 😊