Ruling · Saṅkaṣṭa Caturthī (Sankatahara Chaturthi) · 2026

Sunday 2 August

Determinatein Ujjain, under the Rashtriya Panchang method. Clear of every threshold by 107 minutes.

Decide it for

23°11′ N 75°47′ E · Asia/Kolkata · GeoNames 1253914

The two moonrises

One ghaṭī is 24 minutes. The moonrise is read as disc centre, 31′.

Moonrise of Saturday 1 August

Caturthī does not hold at moonrise. Not taken.

20:56 moonrise
19:4420:0820:3220:5621:2021:4422:08

Absent at moonrise

Moonrise of Sunday 2 August

Taken. The only moonrise Caturthī holds at.

21:28 moonrise
20:1620:4021:0421:2821:5222:1622:40

Holds at moonrise

Caturthī presentMoonrise, the instant the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Caturthī runs from 23:08 on Sat 1 Aug to 23:16 on Sun 2 Aug.

    2026-08-01T17:37:48Z → 2026-08-02T17:45:49Z

  2. 02

    Kāla

    Moonrise is at 20:56 on the 1st and 21:28 on the 2nd.

    moonrise: disc centre, 31′

  3. 03

    Rule

    Caturthī must be current at moonrise. It is not on the 1st and is on the 2nd.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108

  4. 04

    Tie-break

    Only one moonrise qualifies. No tie-break is needed.

    priority: unstated → only-day · margin 6441 s

  5. 05

    Ruling

    Saṅkaṣṭa Caturthī, Ujjain, 2026: Sunday 2 August.

    confidence: determinate

Say it like this

In Ujjain, Saṅkaṣṭa Caturthī (Sankatahara Chaturthi) 2026 falls on Sunday 2 August. Caturthī runs from 23:08 on Sat 1 Aug to 23:16 on Sun 2 Aug and is current at moonrise that day.

ahargana.org/ujjain/festivals/2026/sankashta-chaturthi?on=2026-08-02 · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 2 Aug
Ahargaṇa, classicalDisc centre, no refractionSun 2 Aug
compat-drikpanchangComparison profileSun 2 Aug
No institution has a recorded ruling for Ujjain.

Institutional rulings are recorded with a source address, and are never edited to agree.

The rule, as data

/rules/sankashta-chaturthi · ruleset 2026.3-draft

Month
Every lunation
Pakṣa · aṅga
Kṛṣṇa · Caturthī
Kāla
Moonrise
Priority
Unstated
Tie-break
Longer coverage, as a boundary
Reference
CRC 1955, p. 108

“The sukla caturthi in each month is called Ganesa caturthi or Vinayaka caturthi. It is observed at madhyahna. The chief among them are caturthis of Bhadrapada and Magha. Similarly the krsna caturthi in each month is called Sankasta caturthi, to be observed on the day when the tithi is current at moonrise. It is called Angaraka caturthi if it falls on Tuesday.” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108. It is called Aṅgāraka Caturthī when it falls on a Tuesday; the weekday is not tested.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceCaturthīMoonrise 1stCoveredMoonrise 2ndCoveredRuled
Los Angeles10:38 → 10:4621:42holds22:08no1 Aug
Chicago12:38 → 12:4621:39holds22:00no1 Aug
Jersey City13:38 → 13:4621:44holds22:05no1 Aug
Port of Spain13:38 → 13:4620:45holds21:23no1 Aug
London18:38 → 18:4621:50holds22:01no1 Aug
Durban19:38 → 19:4620:12holds21:10no1 Aug
Dubai21:38 → 21:4620:51no21:22holds2 Aug
Delhi23:08 → 23:1620:53no21:22holds2 Aug
Kolkata23:08 → 23:1620:05no20:37holds2 Aug
Singapore01:38 → 01:4621:22no22:05holds2 Aug
Sydney03:38 → 03:4619:50no20:50holds2 Aug
Suva05:38 → 05:4620:06no20:57holds2 Aug
Profile · tradition
pac-rp@2026.1 · smarta
Rule
sankashta-chaturthi@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s