Nouns name people, places, and things. Every noun can further be classified as common or proper. A proper noun has two distinctive features: 1) it will name a specific [usually a one-of-a-kind] item, and 2) it will begin with a capital letter no matter where it occurs in a sentence. Here is a list of proper nouns (names of people/things) categories: Holidays............................................... Christmas / NewYears Geographical areas................................ New York / Canada People and pets.................................... Richard / Xi Jinping / Hello Kitty / (the name of your pet) Books, Newspapers, Magazines............ The New York Times / The Beijing Review / italki Companies and organizations................ Google / Lenovo Religious terms.................................... God / Christian / Allah / Islam Places, buildings.................................. The Great Wall of China / The Empire State Building Titles................................................... President / Queen / General Secretary Languages........................................... English / Chinese Brand names....................................... Coke / Nike (Nai Ke) Possessive Proper Nouns..................... NewYear's Day / China's holidays / John's house Proper nouns usually (but not always) don’t have determiners/articles. - When is Christmas Day? - When is Children's Day? - Where is Canada? - Who is Barack Obama? - What is Google? - How can I learn English? - Who is Queen Elizabeth? - Do you like Coke? - I celebrate New Year's Day once a year. - Where is The Great Wall of China? - Have you visited The Empire State Building?

You should omit 'the' in both questions.

Usually people just say "When is Christmas?", but you can take out 'the' on both questions