Ruling · Saṅkaṣṭa Caturthī (Sankatahara Chaturthi) · 2026

Tuesday 5 May

Determinatein Ujjain, under the Rashtriya Panchang method. Clear of every threshold by 475 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 4 May

Caturthī does not hold at moonrise. Not taken.

21:30 moonrise
20:1820:4221:0621:3021:5422:1822:42

Absent at moonrise

Moonrise of Tuesday 5 May

Taken. The only moonrise Caturthī holds at.

22:22 moonrise
21:1021:3421:5822:2222:4623:1023:34

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 05:25 on Tue 5 May to 07:52 on Wed 6 May.

    2026-05-04T23:54:48Z → 2026-05-06T02:21:45Z

  2. 02

    Kāla

    Moonrise is at 21:30 on the 4th and 22:22 on the 5th.

    moonrise: disc centre, 31′

  3. 03

    Rule

    Caturthī must be current at moonrise. It is not on the 4th and is on the 5th.

    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 28480 s

  5. 05

    Ruling

    Saṅkaṣṭa Caturthī, Ujjain, 2026: Tuesday 5 May.

    confidence: determinate

Say it like this

In Ujjain, Saṅkaṣṭa Caturthī (Sankatahara Chaturthi) 2026 falls on Tuesday 5 May. Caturthī runs from 05:25 on Tue 5 May to 07:52 on Wed 6 May and is current at moonrise that day.

ahargana.org/ujjain/festivals/2026/sankashta-chaturthi?on=2026-05-05 · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 5 May
Ahargaṇa, classicalDisc centre, no refractionTue 5 May
compat-drikpanchangComparison profileTue 5 May
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 4thCoveredMoonrise 6thCoveredRuled
Los Angeles16:55 → 19:2222:58holds00:32no4 May
Chicago18:55 → 21:2223:22holds00:54no4 May
Jersey City19:55 → 22:2223:21holds00:53no4 May
Port of Spain19:55 → 22:2220:59holds22:39no4 May
London00:55 → 03:2200:16no01:46no5 May
Durban01:55 → 04:2218:59no20:44no5 May
Dubai03:55 → 06:2221:30no23:11no5 May
Delhi05:25 → 07:5221:39no23:20no5 May
Kolkata05:25 → 07:5220:36no22:18no5 May
Singapore07:55 → 10:2221:13no22:55no5 May
Sydney09:55 → 12:2218:30no20:12no5 May
Suva11:55 → 14:2219:21no21:03no5 May
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