For travellers visiting Greece and who are EU citizens, no passport is needed, an identity card containing Latin characters will be sufficient.
The weather in Athens can only be described as heavenly. Mild winters, low humidity, hot summers and pleasant autumns.
There are just over 11 million people in Greece, and 99% of them speak Greek as their first language. Greek is the national language officially, but Turkish is their co-official language because over 1 million people speak Turkish in Cyprus.