MasterCard and Visa are widely accepted in India, especially in the country's major cities and touristy destinations. You can use these credit cards, and sometimes even American Express and Discover card in most hotels, restauarants and shops but be sure to have cash on you when going to less touristy destinations and to to local markets.
The standard voltage in India is 230V. There are three plug types in India: Types C, D and M.
It's recommended to have gotten the following vaccinations before visiting India: Measles, Polio, measles-mumps-rubella, diphtheria-tetanus-pertussis, Chickenpox, and your yearly flu shot. Additional vaccinations you should get are Hepatitis A, Typhoid, Cholera, Hepatitis B, Japenese Encephalitis, Malaria, Rabies and Yellow Fever. There are some rules regarding Yellow Fever vaccinations before a trip to India, so we recommend double checking with the CDC or your doctor for more information.
These are the holidays celebrated in India: