Chaturmas 2027 Dates: 14 July to 10 November

Chaturmas 2027 Kab Se Kab Tak (चातुर्मास 2027)

In the household calendar Chaturmas is counted from one Ekadashi to another: from Devshayani, the bright-fortnight Ekadashi of Ashadha, to Prabodhini or Dev Uthani, the bright-fortnight Ekadashi of Kartika. The site’s 2027 panchang, generated from the JPL DE421 ephemeris, puts the first on Wednesday, 14 July 2027 and the second on Wednesday, 10 November 2027. The two dates are 119 days apart. The site’s muhurat engine closes both edge days in full, so by its count 120 calendar days of 2027 sit inside Chaturmas.

The window does not keep its dates from one year to the next. It is set by tithis, and a run of twelve lunations is shorter than the solar year, so the 2027 start comes 354 days after the 2026 start and the 2027 end 355 days after the 2026 end: 11 and 10 days earlier on the calendar. A list that carries last year’s late-July start into 2027 is out by more than a week.

Chaturmas Kab Khatm Hoga: the 2026 Window Ends on 20 November 2026

The Chaturmas running as this page is published began at Devshayani Ekadashi on Saturday, 25 July 2026. The site’s 2026 table and its engine both end it on Friday, 20 November 2026, 25 days after 26 October 2026 and 118 days after it began.

That end date comes with a caveat the 2027 one does not have. The 2026 Dev Uthani Ekadashi opens at 07:16 on 20 November, after that morning’s 06:47 sunrise in New Delhi, and is over at 06:32 on 21 November, before the 06:48 sunrise there. No New Delhi sunrise falls inside it, so the daily table reads Shukla Dashami on the 20th and Shukla Dwadashi on the 21st, and calendars that close Chaturmas on 21 November have a reason to. Further east and south the Sun rises earlier: the site’s sunrise code puts Kolkata at 05:52 and Chennai at 06:10 on the 21st, before the Ekadashi ends, so there the tithi does hold that morning. The Dev Uthani Ekadashi 2026 page works through both days and the city sunrises. This page follows the table and gives 20 November.

The engine’s 2026 calendar then has one open stretch left, 21 November to 15 December, 25 days, which ends on the eve of the Dhanu Kharmas that begins on 16 December 2026. Its strict marriage filter clears three days in that stretch.

Why Both 2027 Edges Are Settled

Each of the 2027 Ekadashis is the plain case. Devshayani opens at 12:09 on 13 July, after that day’s sunrise, and is still running at the 05:32 sunrise of 14 July; the sunrise tithi is Shukla Dashami the morning before and Shukla Dwadashi the morning after. Dev Uthani opens at 07:35 on 9 November and holds the 06:39 sunrise of 10 November before closing at 09:11. One sunrise each, with no second candidate.

The same holds away from New Delhi. Comparing both tithi windows with the sunrises the site’s code computes for Delhi, Mumbai, Ahmedabad, Chennai, Kolkata and Guwahati, every opening falls after the previous morning’s sunrise and every closing after the festival morning’s, by half an hour or more each time. The narrowest margin is Ahmedabad’s: its sunrise on 9 November comes at 06:49, 46 minutes before Dev Uthani’s Ekadashi begins. The Vaishnava test, which asks whether Dashami is still running at arunodaya, about 96 minutes before sunrise, gives the same two days, because both Ekadashis begin the previous day. So if one almanac prints 14 July and 10 November and another prints different dates, the likelier cause is a different reckoning of Chaturmas, set out below, and not a different Ekadashi.

Four Lunar Months, Two Ways of Naming Them

“Chatur-mas” means four months, and Devshayani to Dev Uthani is exactly four lunations, Shukla Ekadashi to Shukla Ekadashi. Which months they are called depends on where a calendar starts its month. Amanta calendars, the convention the site’s festival rules use, run a month from new moon to new moon; purnimanta calendars, the usual reckoning in the north, run it from full moon to full moon, so their dark fortnight carries the name of the month ahead. The table counts the 120 days of the 2027 window by the month their New Delhi sunrise falls in, with the lunation instants that divide them.

Both reckonings hold Shravana, Bhadrapada and Ashwina whole. They differ at the ends. Amanta Chaturmas spends 20 days in Ashadha and only 12 in Kartika; purnimanta Chaturmas spends 5 days in Ashadha, since the Ashadha full moon comes four days in, and 26 in Kartika, because the purnimanta Kartika begins with the dark fortnight that holds Diwali. That is why one source calls Diwali a Kartika festival and another an Ashwina one: the site’s festival rules record Diwali as amanta Ashwina, and a north Indian calendar names the same fortnight Kartika.

Sawan and Pitru Paksha Inside It

The purnimanta Shravan, the Sawan of north India, opens at the full moon of 21:14 on 18 July, the instant that ends Guru Purnima’s tithi, so its first sunrise is 19 July, on Krishna Pratipada. It closes at 12:58 on 17 August, the end of the Purnima the table dates Raksha Bandhan to. Amanta calendars put Shravan between the new moons of 2 August and 31 August instead, which is why Janmashtami, on 24 August, is a Shravan festival in the site’s rules and a Bhadrapada one on a north Indian calendar.

The festival table opens Pitru Paksha on Wednesday, 15 September 2027, the day after Anant Chaturdashi, and closes it with Sarva Pitru Amavasya on 30 September, the same date the table gives for the start of Sharad Navratri. The engine does not treat the fortnight as a separate closure; its Chaturmas note records that Pitru Paksha sits inside the period and is avoided in its own right, and the whole fortnight is already closed for marriage by Chaturmas.

The Ekadashis From Yogini to Utpanna

Between the two edges there are seven more Ekadashis. The table runs from the one before Chaturmas to the one after, named by the labels the vrat-katha collections give to each month’s two Ekadashis, and its dates match the site’s Ekadashi 2027 list, which computes them the same way.

Two of the seven are not settled by one sunrise. The instants in this paragraph are not festival-table rows; they come from the site’s lunar code, which agrees with the DE421 tables to within a minute wherever both give a tithi. Kamika runs from 07:34 on 29 July to 05:13 on 30 July and is current at no New Delhi sunrise, so almanacs split between the day it occupies and the next morning. Rama begins at 05:41 on 25 October, which makes 25 October an Ekadashi morning by the sunrise rule, but Dashami is still running at arunodaya, so a Vaishnava calendar moves it to 26 October. The list page sets out both cases in detail.

Festivals Inside Chaturmas 2027

Of the 45 rows in the site’s 2027 festival table, 22 fall strictly between the two Ekadashis, from Guru Purnima four days in to Chhath six days before the end. Close to half the table’s rows fall in this third of the year, so the season the engine closes for weddings is also the busiest stretch of the festival calendar.

One row carries the table’s vriddhi flag, Durga Ashtami: its tithi holds two sunrises, the table keeps the first, and a calendar that keeps the second is not in error. The Navratri 2027 page explains that fortnight, and the 2027 festival calendar gives the year as a whole.

What the Muhurat Engine Closes, and What It Leaves Open

Chaturmas is a narrower closure than Kharmas on this site. Of the 10 occasions the engine evaluates, Kharmas closes 9; Chaturmas closes three: marriage, griha pravesh and upanayan. For the rest, the engine’s own notes give the reason:

• Business start: “Chaturmas is not applied here: Dhanteras and Diwali fall inside it and are the traditional day to open new account books.” Dhanteras falls on 27 October and Diwali on 29 October in 2027, both inside the window.
• Vehicle purchase: “A purchase is not a samskara, so Chaturmas is widely treated as open for it.”
• Namakaran and mundan: each note ends “Practice during Chaturmas varies by community.” The engine leaves these days open and does not decide the question for a family.
• Griha pravesh is closed, but its note is written for a first entry into a new house and adds: “Re-entry after repairs or a long absence is treated more leniently, and Chaturmas is often accepted for it.”
• Annaprashan, property and travel are not closed by Chaturmas, and their notes do not mention it.

The engine still runs the five limbs inside the window, which shows how much of the work Chaturmas is doing. For marriage, ten days between 14 July and 10 November pass tithi, vara, nakshatra, yoga and karana together; every one is closed, five of them by Chaturmas alone and the others by an asta closure as well. Griha pravesh has ten such days and upanayan twelve, all closed. On the occasions it leaves open, the engine finds eleven clear days for a business start and twelve for a vehicle purchase inside the window. Those are the engine’s verdicts, not muhurats: a clear day is a shortlist entry, and choosing the hour inside it is a further step the engine does not take.

Before and After: the Open Stretches

On the engine’s 2027 calendar the spring stretch that opens after Meena Kharmas on 15 April is ended by a planetary asta a little before Devshayani, so the closed run starts ahead of Chaturmas; this page does not print asta boundaries, and the Kharmas 2027 page explains the gap. After Dev Uthani the engine opens 11 November to 15 December, 35 days, ending on the eve of the Dhanu Kharmas of 16 December 2027. Its strict marriage filter clears four days in that stretch and griha pravesh three; the November 2027 marriage page shows each day with its reason, and the muhurat finder runs the same engine for any month. The muhurat hub collects the occasions.

Other Reckonings of the Four Months

In the Puranic account behind the two Ekadashi names, Vishnu enters yoganidra on Devshayani and wakes on Prabodhini, and the household calendar takes its four months from that story. It is not the only count. Monastic orders reckon their chaturmas vrat from Ashadha Purnima, which in 2027 is Sunday, 18 July, and the Guru Purnima page sets out that second count. Jain communities keep a chaturmas of their own, fixed by their own calendar, with boundary days that differ from both; the site’s data does not compute it, so no Jain date is given here.

What This Page Does Not Do

It gives the edges of Chaturmas as the site’s tables compute them, for New Delhi, with the other cities checked against the same tithi instants. It does not read anyone’s chart, name a wedding or griha pravesh date, or say what follows from holding a ceremony inside the window or outside it. For the edges themselves, the Devshayani Ekadashi 2027 and Dev Uthani Ekadashi 2027 pages give each day’s tithi and timings; for a single date, the daily panchang gives all five limbs. In Hindi: चातुर्मास 2027: 14 जुलाई से 10 नवम्बर तक, तारीखें और मास.