India has different types of calendars such as Gregorian, Hindu, Islamic, and different regional calendars that are used for different purposes.

The Gregorian calendar, widely used in India for official and business purposes, follows a standard format of 12 months of varying length, with January 1 as  New Year’s Day.

The Hindu calendar, also known as  Panchangam, is the traditional lunar calendar used in India for religious and cultural purposes. Each month is based on a lunar phase, according to the 12-month lunar cycle. The Hindu calendar contains various festivals, auspicious days and holidays that are important to the Hindu community.

The Islamic calendar, also called the Hijra calendar, is used by Muslims in India to determine religious dates and observances. The lunar cycle is 12 months long and each month begins with the observation of a new moon.

In addition to these calendars, there are also  various regional calendars in India, such as the Tamil calendar,  Telugu calendar, and  Bengali calendar. These calendars are based on local customs and traditions and may include various festivals, holidays and auspicious dates.

Overall, India’s diverse cultures and traditions have given rise to several types of calendars, each with its own characteristics and meanings.