There is no time difference between Bangalore and Kolkata. Both cities use India Standard Time (IST, UTC+5:30). When it's 12:00 PM in Bangalore, it's also 12:00 PM in Kolkata.
India uses a single timezone across the entire country, so all major Indian cities are synchronized.
Any time works! Since both cities share the same timezone, you can schedule calls during standard business hours (9:00 AM - 6:00 PM) without any time conversion needed.
Bangalore and Kolkata represent different aspects of India's economy. Bangalore is the modern IT hub, while Kolkata is a historic cultural and commercial center in Eastern India. Despite being geographically distant, they share the same time, making business coordination easy.