Gokulashtami marks the birth of Bhagwan Shri Krishna, fixed by the tithi Shravan Krishna paksha Ashtami (the eighth day of the waning fortnight of Shravan masa). Krishna is believed to have been born at midnight (Nishith kaal) under the Rohini nakshatra, so devotees keep an upvas (the fast) and a night vigil on Ashtami, perform the birth puja at midnight, and do parana (break the fast) the next day (Navami). In 2026 this falls on Friday, 4 September. In Maharashtra the next day — 5 September — is celebrated with great energy as Dahi Handi / Gopalkala. For the exact midnight-puja time in a given year, see this site's today's panchang and the 4 September day page.
Gokulashtami = Krishna Janmashtami = Janmashtami — one and the same festival, with different names (also called Ashtami Rohini yoga, or Shri Jayanti).
Gokulashtami is one of the major festivals of the Shravan masa — alongside Nag Panchami and Narali Purnima / Raksha Bandhan. Shri Krishna is the eighth avatar (purnavatar) of Bhagwan Vishnu — the teacher of the Gita, the hero of the childhood leelas of Gokul and Vrindavan, and the lord of Dwarka — and so is revered across India.
The core belief is that Krishna was born at midnight, on the Ashtami tithi under the Rohini nakshatra; that is why the focus of the puja and the vigil is the Nishith kaal (midnight). The festival is special at Gokul, Mathura, Vrindavan, Dwarka and Jagannath Puri; in Maharashtra, the public celebration of Dahi Handi and Gopalkala gives it a distinct identity.
The tithi is the real identity; the Gregorian date is only that year's detail. The what / why / how and the katha live on this page (evergreen); but the exact timings for a given year — the Nishith puja window, the Ashtami/Rohini end times, the parana time and that day's Rahukaal — are date-bound and belong on the 4 September day page.
A note (specific to 2026): the general rule is only that Janmashtami falls on the day when Ashtami is strong at Nishith kaal, and the Rohini nakshatra yoga is considered especially auspicious. It is not the case that Ashtami and Rohini coincide exactly at midnight every year; the precise timings shift year to year and are best read on the day page.
There is one main Puranic story (its sources are the Bhagavata Purana — 10th canto, the Harivamsha and the Vishnu Purana — ancient and public-domain). Its shared thread is told respectfully below; the details differ across versions, so no single version is presented as the "final" one.
Kamsa, the tyrant king of Mathura, received a prophecy that the eighth child of his sister Devaki and her husband Vasudeva would be his end. In fear, he imprisoned Devaki and Vasudeva and began killing their children one by one.
At midnight on Shravan Krishna Ashtami, the eighth child — Shri Krishna — was born. At that moment the guards fell asleep and the prison doors opened on their own. Vasudeva carried the newborn Krishna across the (rain-swollen, flooding) Yamuna to Nanda and Yashoda in Gokul, and brought back the newborn girl there to place with Kamsa. Krishna then grew up in Gokul in the love of Yashoda and Nanda; Balaram was his elder brother.
In some versions details such as the role of Yogamaya, Sheshnag holding a canopy over Vasudeva's head, and the Yamuna parting to make way are told; these details differ from source to source, so they are best taken in the form "in some versions it is said that…".
The companion story of Gopalkala: while grazing the cows along the Yamuna, Krishna and his companions would pool everyone's tiffins together to make a kala (a mixture) and share it; the child Krishna would also steal butter and curd from house to house. In imitation of these childhood leelas, the day after Janmashtami is celebrated as kala and Dahi Handi. (Kala literally means "to mix together.")
Krishna devotees — women, men and whole families — keep the upvas and a night vigil on Ashtami and perform the birth puja at midnight. Dahi Handi / Gopalkala, on the other hand, is a social and public celebration — held by Govinda troupes (young men and women), mandals, and neighbourhood by neighbourhood.
The general sequence is below; the exact mantras, sankalp and steps vary by family and by the priest's tradition, so it should not be taken as the only "rule."
As this is an annual tithi festival, it has no fixed "udyapan" the way a vrat series does. The main puja is at midnight; the exact Nishith time for a given year shifts by city, so check it on the 4 September day page.
A murti or image of the child Krishna and a palna (cradle), haldi-kunku, akshata and gandha, flowers and tulsi, dhoop-deep and niranjan, panchamrut (milk, curd, ghee, honey, sugar) for the abhishek, butter-sugar and fruit for the naivedya, clothes and ornaments, and the aarti items. (The samagri varies a little by region and family tradition.)
The strictness of the upvas (nirjal / phalahar / ekbhukt) and the exact parana time vary by family and by sampradaya (tradition), so treat these as your household's custom rather than a universal rule. If Janmashtami falls on a Monday, it coincides with the Shravani Somvar fast and the question of "which to break first" arises — but in 2026 Janmashtami is on a Friday, so this clash does not occur this year.
The dwadashakshar mantra (traditional / Puranic): "Om Namo Bhagavate Vasudevaya" — its meaning (in brief): salutations to Bhagwan Vasudeva (Shri Krishna). This is a well-known jap mantra of Krishna worship.
Krishna aarti — "Ovalu Aarti Majhya Madan Gopala" (by Eka Janardani / Sant Eknath) — sung after the midnight puja on Janmashtami, and daily in homes.
Shlokas from the Bhagavad Gita and the Bhagavata can be cited, but their full text should be checked for rights and accuracy against a trusted reference before use; avoid specific astrological-remedy claims.
In Maharashtra the strength of this festival is Dahi Handi / Gopalkala (day two, 5 September 2026):
So: do not state "20 feet and age 18/14" as a single final rule in the present tense; give the timeline above and be sure to check the current year's rules and government orders before publishing (this position is time-bound and politically sensitive).
Other regions (for the record): North India has Raslila and Mathura-Vrindavan; Gujarat/Rajasthan have Makhan Handi, garba/raas and Pushtimarg; the South has kolam and painted footprints; the East/Northeast have Sattriya and Manipuri Raslila. Amanta vs Purnimanta naming: in Maharashtra (amanta) this tithi is Shravan Krishna Ashtami; in the North's purnimanta tradition the same tithi is called Bhadrapad Krishna Ashtami — the same day, only the month-name differs.