They never happen at the same time. The latest Diwal can start is mid November. The absolute earliest date Hanukkah can start is the last few days of november, but 90% of the time, it starts in December.
A calendar of Diwali dates shows that it won't even be close to Hanukkah (with two weeks of each other) for at least the next 50 years.
Hanukkah goes according to the Hebrew calendar and can occur at any time in late November or the month of December. Thanksgiving is in late November.
Hispanics in the United States celebrate Thanksgiving much like other residences do. The day is cantered around spending time with family, preparing and eating food. After the meal the family visits, entertains with music and games for Thanksgiving is a day to give thanks for having made it through another year.
Thanksgiving always falls on the 4th Thursday in November. Every time the 26th is the 4th Thursday in November, then Thanksgiving and your birthday will fall on the same Thursday.
You say "Hag Hanukkah sameach" in response.
Hanukkah is a holiday. Not a language. During Hanukkah you would say "hello" the same as on a regular day. You can also greet people by saying "Happy Hanukkah".
Only the Jews celebrate Hanukkah, whether they live in Rome or elsewhere. The main observances of Hanukkah, such as its prayers and the lighting of the candles, are the same everywhere.
The same as Jews everywhere.
Pretty much the same as today: lighting the Hanukkah-menorah and saying the appropriate blessings and prayers.
No. The Day of Atonement, which is Yom Kippur, is about two and a half months before the beginning of Hanukkah.
No. Hanukkah comes out according to the Hebrew calendar, not the Western (Gregorian) one. Hanukkah was founded over 150 years before the onset of Christianity.
The same as everywhere else.
No, Thanksgiving doesn't always fall on the same date every year, just like Easter.