Ruling · Saṅkaṣṭa Caturthī (Sankatahara Chaturthi) · 2026

Tuesday 6 January

Determinatein Ujjain, under the Rashtriya Panchang method. Clear of every threshold by 584 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 Monday 5 January

Caturthī does not hold at moonrise. Not taken.

20:07 moonrise
18:5519:1919:4320:0720:3120:5521:19

Absent at moonrise

Moonrise of Tuesday 6 January

Taken. The only moonrise Caturthī holds at.

21:09 moonrise
19:5720:2120:4521:0921:3321:5722:21

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 08:02 on Tue 6 Jan to 06:53 on Wed 7 Jan.

    2026-01-06T02:32:09Z → 2026-01-07T01:23:03Z

  2. 02

    Kāla

    Moonrise is at 20:07 on the 5th and 21:09 on the 6th.

    moonrise: disc centre, 31′

  3. 03

    Rule

    Caturthī must be current at moonrise. It is not on the 5th and is on the 6th.

    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 35050 s

  5. 05

    Ruling

    Saṅkaṣṭa Caturthī, Ujjain, 2026: Tuesday 6 January.

    confidence: determinate

Say it like this

In Ujjain, Saṅkaṣṭa Caturthī (Sankatahara Chaturthi) 2026 falls on Tuesday 6 January. Caturthī runs from 08:02 on Tue 6 Jan to 06:53 on Wed 7 Jan and is current at moonrise that day.

ahargana.org/ujjain/festivals/2026/sankashta-chaturthi?on=2026-01-06 · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 6 Jan
Ahargaṇa, classicalDisc centre, no refractionTue 6 Jan
compat-drikpanchangComparison profileTue 6 Jan
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 6thCoveredMoonrise 7thCoveredRuled
Los Angeles18:32 → 17:2320:57no21:59no5 Jan
Chicago20:32 → 19:2320:40no21:48no5 Jan
Jersey City21:32 → 20:2320:45no21:52no5 Jan
Port of Spain22:32 → 21:2321:21holds22:10no6 Jan
London02:32 → 01:2320:15holds21:35no6 Jan
Durban04:32 → 03:2321:35holds22:05no6 Jan
Dubai06:32 → 05:2321:02holds22:00no6 Jan
Delhi08:02 → 06:5320:57holds21:57no6 Jan
Kolkata08:02 → 06:5320:17holds21:14no6 Jan
Singapore10:32 → 09:2322:04holds22:51no6 Jan
Sydney13:32 → 12:2322:29holds22:58no6 Jan
Suva14:32 → 13:2321:17holds21:55no6 Jan
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