There are two types of Hindu Calendar in regards to a month,
- Amavasyant calendar
- Purnimant Calendar
Amavasyant Calendar (Amanta Lunar Hindu Calendar)
In the Amavasyant Calendar, the month begins just after the day of Amavasya (Shukla Amavasya) or the new moon day, till the next Amavasya.
In the Amavasyant calendar, the first 15 days are Shukla Paksha and the next 15 days would be Krishna Paksha. As the month ends with the Amavasya it is called ‘The Amanta Lunar Hindu Calendar’.
We can understand it, simple as Amavasya+Ant = Amavasyant
The Amavasyant Calendar is mainly followed in the southern and eastern states of India:
- Andhra Pradesh
- West Bengal
Purnimant Calendar (Purnimanta Lunar Hindu Calendar)
In the Purnimant Calendar, the month begins just the day after Purnima or the full moon day, till the next Purnima.
In the Purnimant calendar, the first 15 days are called Krishna Paksha and the next 15 days would be Shukla Paksha. As the month ends with the Purnima it is called ‘The Purnimanta Lunar Hindu Calendar’.
We can understand it, simple as Purnima+Ant = Purnimant
The Purnimant Calendar is mainly followed in the northern states of India:
- Himachal Pradesh
- Jammu and Kashmir
- Madya Pradesh
- Uttar Pradesh
*** But all the festival days still fall on the same day, but the name of the month may be different. For example, In North India, Sri Krishna Janmashtami falls on Bhadrapada Shukla Paksha Ashtami, In South India, Shravana Shukla Paksh Ashtami.