He started work on the new calendar in the 1960s.  The PSGPC and a majority of the other gurdwara managements across the world are opposing the modified version of the calendar citing that the SGPC reverted to the Bikrami calendar.
This page has been archived and is no longer updated.  The methods for calculating the beginning of the Khalsa era were based on the Bikrami calendar.  The start of each month is fixed.
d) Fix the beginning of the months in relation to the Common Era calendar as follows: With the above scheme, any given date of any month of the Nanakshahi calendar will always occur on the same date of the Common Era calendar, except in the month of Phagun in a leap year when the corresponding dates of Phagun from March 1 to March 13 will differ by 1 day from those of the same month in non- leap years. An example of movable celebration is the Parkash Gurpurb of Guru Gobind Singh. , Features of the Original Nanakshahi calendar (2003 Version):, In 2010, the Shiromani Gurdwara Prabhandak Committee ("SGPC") modified the calendar so that the dates for the start of the months are movable so that they coincide with the Bikrami calendar and changed the dates for various Sikh festivals so they are based upon the lunar phase. Movable dates for Sikh Festivals in the 2003 and 2010 versions. [tab title=”Nanakshahi Jantri”] Vaisakhi, Maghi, and shaheedi purbs of Sahibzadas are already being celebrated according to the solar dates. The year length was also the same as the Bikrami solar year.
Third, all the dates should be fixed and not vary from year to year. The Granth Sahib is also carried in procession on a float decorated with flowers throughout the village or city. A committee, under the aegis of the Institute of Sikh Studies Chandigarh, was formed to study this problem. The movable festivals are called as such, because their dates are not fixed in relation to the solar year. The calendar is based on the length of the tropical solar year, instead of the lunar cycle, meaning that dates will not fluctuate from year to year as they did previously under the old lunar based calendar. Third, all the dates should be fixed and not vary from year to year. The BBC is not responsible for the content of external sites. Second, it should discard the lunar calendar and use only a solar one.  According to Steel (2000), (since the calendar was based on the Bikrami), the calendar has twelve lunar months that are determined by the lunar phase, but thirteen months in leap years which occur every 2–3 years in the Bikrami calendar to sync the lunar calendar with its solar counterpart. This lunar date occurs on the following dates of the Common Era and Bikrami Era (solar) during the following eleven years: This Gurpurb did not occur in the CE years 1991, 1993 and 1996.  The epoch of this calendar is the birth of the first Sikh Guru, Nanak Dev in 1469 and the Nanakshahi year commences on 1 Chet. Singh Bros, Singh, Patwant (2008) Empire of the Sikhs: The Life and Times of Maharaja Ranjit Singh. BBC © 2014 The BBC is not responsible for the content of external sites.
The Nanakshahi calendar is used for all the Gurupurabs (festivals marking events in the lives of the Gurus) except the birthday of Guru Nanak which continues to be celebrated according to the Hindu Lunar calendar on Katik Poornamashi. f) The list of Gurpurbs according to the solar dates is as follows : It must be noted that the dates given above in the Nanakshahi calendar are the original dates of the solar Bikrami year. From year to year they occur on different dates of the solar year, though their lunar date is the same every year.
 According to Dilgeer (1997), Banda "continued adopting the months and the days of the months according to the Bikrami calendar". Nanakshahi Calendar: Sense & Sensibility.
Traditionally, both these calendars closely followed the Bikrami calendar with the Nanakshahi year beginning on Katak Pooranmashi (full moon) and the Khalsa year commencing with Vaisakhi. The Nanakshahi (Punjabi: ਨਾਨਕਸ਼ਾਹੀ, nānakshāhī, Shahmukhi Punjabi:نانک شاہی) calendar is a tropical solar calendar that is used in Sikhism and is based on the 'Barah Maha' (Punjabi: ਬਾਰਹ ਮਾਹਾ).Barah Maha was composed by the Sikh Gurus and translates as the "Twelve Months". Department of Punjab Historical Studies, Punjabi University, Siṅgha, Sukhadiāla (1996) Historical analysis of Giani Gian Singh's writings.UICS, The Panjab Past and Present, Volume 32 (2001) Department of Punjab Historical Studies, Punjabi University, Chilana, Rajwant Singh (2006) International Bibliography of Sikh Studies. Some politicians pointed out that the old Vikrami calendar, and the sharing of some Hindu and Sikh festivals, was one of the few elements of Punjab culture that had survived the growing breakdown between the Sikh and Hindu communities in North India. Gurpurabs mark the culmination of Prabhat Pheris, the early morning religious procession which goes around the localities singing shabads (hymns). The final month is Phagun which can be 30 or 31 days. The Nanakshahi (Punjabi: ਨਾਨਕਸ਼ਾਹੀ, nānakshāhī, Shahmukhi Punjabi:نانک شاہی) calendar is a tropical solar calendar that is used in Sikhism and is based on the 'Barah Maha' (Punjabi: ਬਾਰਹ ਮਾਹਾ). Others argued that the new calendar wasn't really Sikh at all, but was just a "solarised" version of the Hindu calendar or a version of the Western calendar with added Sikh elements. " In reality however, state Haar and Kalsi (2009), the introduction of the Nanakshahi calendar has resulted in many festivals being "celebrated on two dates depending on the choice of the management of the local gurdwaras.
[/tabs], [button align=”left” full=”true” link=”https://googledrive.com/host/0Bx2oWL8CizGgOURyak8xMVlmUGs/nitnem_in_gurmukhi_(uni)_sikhvichardhara.com.pdf” bgColor=”#B8FF73″ textColor=”#000000″ hoverBgColor=”#ff8200″ hoverTextColor=”#FFFFFF” width=”100″]japji sahib[/button]. (These change every year in line with the Lunar Phase), Features of the Nanakshahi calendar (2003), J. Gordon Melton, Martin Baumann (2010) Religions of the World: A Comprehensive Encyclopedia of Beliefs and Practices, 2nd Edition [6 volumes]. The Nanakshahi calendar is a distinctly Sikh calendar system formulated in the twentieth century.  According to Steel (2000), (since the calendar was based on the Bikrami), the calendar has twelve lunar months that are determined by the lunar phase, but thirteen months in leap years which occur every 2–3 years in the Bikrami calendar to sync the lunar calendar with its solar counterpart. It also lists as "martyrdom days" the death anniversary of the two assassins of the former Indian Prime Minister Indira Gandhi.
This committee held meetings at Chandigarh and formulated proposals. Rowman & Littlefield, Knut A. Jacobsen (2008) South Asian Religions on Display: Religious Processions in South Asia and in the Diaspora.
The Nanakshahi (Punjabi: ਨਾਨਕਸ਼ਾਹੀ, nānakshāhī, Shahmukhi Punjabi:نانک شاہی) calendar is a tropical solar calendar that is used in Sikhism and is based on the 'Barah Maha' (Punjabi: ਬਾਰਹ ਮਾਹਾ).Barah Maha was composed by the Sikh Gurus and translates as the "Twelve Months". a solar calendar; called Nanakshahi after Guru Nanak (founder of Sikhism) year one is the year of Guru Nanak's birth (1469 CE) The calendar didn't fix the date of all Sikh festivals. e) Celebrate the Gurpurbs according to the solar dates, and not according to the sudis and vadis of the lunar calendar. The amended Nanakshahi calendar was adopted in 1998 but implemented in 2003 by the Shiromani Gurdwara Prabhandak Committee to determine the dates for important Sikh events.  The Sikh bodies termed it a step taken under pressure from the RSS and Shiromani Akali Dal. The festivals and Gurpurbs that are celebrated according to the lunar calendar are called movable, and those that are celebrated according to the solar calendar are called fixed.
Date Converter Bikrami Converter Movable Gurpurabs. Sikhs see the adoption of the new calendar as a big step forward for the Sikh identity, and one that will help dispel any assumptions that Sikhism is a branch of some other religion.
The new Nanakshahi calendar is simple, rational, more accurate than the Bikrami calendar, and conforms to Gurbani. ,Punjabi University, Patiala. The celebrations start with the three-day akhand path, in which the Guru Granth Sahib (the holy book of the Sikhs) is read continuously from beginning to end without a break. after his victory in Sirhind (12 May 1710 C.E. ", The start date of the months in the current Nanakshahi calendar are not fixed.. June 4 is noted as the anniversary of the attack on the Akal Takht, and June 6 as the "martyrdom" of Sant Baba Jarnail Singh Bhindranwale. Moderate Sikhs were anxious about anything that might cause trouble between Sikhs and Hindus in the hothouse atmosphere of Indian communal relations, particularly in the Sikh heartland of the Punjab. Springer Science & Business Media, Kepel, Martin (2006) The Structure and Mathematics of the Principal Calendars of the Western World: Muslim, Gregorian, Jewish, and Other Systems. The corresponding dates of the Common Era are those of the Gregorian Calendar that is now in use in most countries of the world along with local calendars.
Publications Bureau, Proceedings – Punjab History Conference, Volume 27, Part 1 (1996) Punjabi University, Kay, Michael (2011)