Ruling · Saṅkaṣṭa Caturthī (Sankatahara Chaturthi) · 2026

Sunday 5 April

Determinatein Ujjain, under the Rashtriya Panchang method. Clear of every threshold by 513 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 Sunday 5 April

Taken. The only moonrise Caturthī holds at.

21:49 moonrise
20:3721:0121:2521:4922:1322:3723:01

Holds at moonrise

Moonrise of Monday 6 April

Caturthī does not hold at moonrise. Not taken.

22:44 moonrise
21:3221:5622:2022:4423:0823:3223:56

Absent 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 12:00 on Sun 5 Apr to 14:11 on Mon 6 Apr.

    2026-04-05T06:30:17Z → 2026-04-06T08:41:07Z

  2. 02

    Kāla

    Moonrise is at 21:49 on the 5th and 22:44 on the 6th.

    moonrise: disc centre, 31′

  3. 03

    Rule

    Caturthī must be current at moonrise. It is on the 5th and is not 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 30753 s

  5. 05

    Ruling

    Saṅkaṣṭa Caturthī, Ujjain, 2026: Sunday 5 April.

    confidence: determinate

Say it like this

In Ujjain, Saṅkaṣṭa Caturthī (Sankatahara Chaturthi) 2026 falls on Sunday 5 April. Caturthī runs from 12:00 on Sun 5 Apr to 14:11 on Mon 6 Apr and is current at moonrise that day.

ahargana.org/ujjain/festivals/2026/sankashta-chaturthi?on=2026-04-05 · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 5 Apr
Ahargaṇa, classicalDisc centre, no refractionSun 5 Apr
compat-drikpanchangComparison profileSun 5 Apr
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 5thCoveredMoonrise 6thCoveredRuled
Los Angeles23:30 → 01:4123:14holds00:12no5 Apr
Chicago01:30 → 03:4123:35holds00:35no5 Apr
Jersey City02:30 → 04:4123:34holds00:34no5 Apr
Port of Spain02:30 → 04:4121:21holds22:13no5 Apr
London07:30 → 09:4100:17holds01:26no5 Apr
Durban08:30 → 10:4119:35holds20:17no5 Apr
Dubai10:30 → 12:4121:48holds22:44no5 Apr
Delhi12:00 → 14:1121:56holds22:52no5 Apr
Kolkata12:00 → 14:1120:55holds21:50no5 Apr
Singapore14:30 → 16:4121:39holds22:28no5 Apr
Sydney16:30 → 18:4119:12holds19:50no5 Apr
Suva18:30 → 20:4119:55holds20:39holds5 Apr
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