Ruling · Mahālaya Amāvāsyā (Sarvapitṛ Amāvāsyā) · 2026

Saturday 10 October

Determinatein Ujjain, under the Rashtriya Panchang method. Clear of every threshold by 335 minutes.

Decide it for

UjjainDelhiKolkataSingaporeSydneyJersey City

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

The two afternoons

One ghaṭī is 24 minutes. Aparāhṇa is 10th to 12th of 15 day muhūrtas.

Afternoon of Friday 9 October

Amāvasyā is absent from aparāhṇa. Not taken.

13:25 aparāhṇa beginsaparāhṇa ends 15:46
13:0113:2513:4914:1314:3715:0115:2515:4916:13

0 of 141 minutes covered

Afternoon of Saturday 10 October

Taken. The only afternoon Amāvasyā reaches.

13:24 aparāhṇa beginsaparāhṇa ends 15:45
13:0013:2413:4814:1214:3615:0015:2415:4816:12

141 of 141 minutes covered

Amāvasyā presentAparāhṇa, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Amāvasyā runs from 21:36 on Fri 9 Oct to 21:20 on Sat 10 Oct.

    2026-10-09T16:06:18Z → 2026-10-10T15:50:05Z

  2. 02

    Kāla

    Aparāhṇa is 10th to 12th of 15 day muhūrtas: 13:25–15:46 on the 9th, 13:24–15:45 on the 10th.

    aparahna: day-muhurta-10-12 · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Amāvasyā must be present during aparāhṇa. It covers 0 of 141 minutes on the 9th and 141 of 141 on the 10th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103

  4. 04

    Tie-break

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

    priority: unstated → only-day · margin 20110 s

  5. 05

    Ruling

    Mahālaya Amāvāsyā, Ujjain, 2026: Saturday 10 October.

    confidence: determinate

Say it like this

In Ujjain, Mahālaya Amāvāsyā (Mahalaya) 2026 falls on Saturday 10 October. Amāvasyā runs from 21:36 on Fri 9 Oct to 21:20 on Sat 10 Oct and covers all of aparāhṇa that afternoon.

ahargana.org/ujjain/festivals/2026/mahalaya-amavasya · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 10 Oct
Ahargaṇa, classicalDisc centre, no refractionSat 10 Oct
compat-drikpanchangComparison profileSat 10 Oct
Rashtriya PanchangPrincipal festivals, 2026-27Sat 10 Oct

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

The rule, as data

/rules/mahalaya-amavasya · ruleset 2026.3-draft

Month
Bhādrapada, amānta
Pakṣa · aṅga
Kṛṣṇa · Amāvasyā
Kāla
Aparāhṇa
Priority
Unstated
Tie-break
Longer coverage, as a boundary
Reference
CRC 1955, p. 103

“K 30 Mahalaya amavasya (aparahnavyapini)” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103. The note on p. 106 gives the first day in a decreasing tithimāna and the second in an increasing one, when amāvāsyā covers the whole of aparāhṇa on both days; tithimāna is not computed.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceAmāvasyāAparāhṇa 9thCoveredAparāhṇa 10thCoveredRuled
Los Angeles09:06 → 08:5013:49138 min13:490 min9 Oct
Chicago11:06 → 10:5013:46136 min13:450 min9 Oct
Jersey City12:06 → 11:5013:52137 min13:510 min9 Oct
Port of Spain12:06 → 11:5013:05143 min13:050 min9 Oct
London17:06 → 16:5013:540 min13:53132 min10 Oct
Durban18:06 → 17:5012:590 min12:59152 min10 Oct
Dubai20:06 → 19:5013:160 min13:16140 min10 Oct
Delhi21:36 → 21:2013:180 min13:18140 min10 Oct
Kolkata21:36 → 21:2012:340 min12:34141 min10 Oct
Singapore00:06 → 23:5014:040 min14:04145 min10 Oct
Sydney03:06 → 02:5013:590 min13:59153 min10 Oct
Suva04:06 → 03:5013:080 min13:08149 min10 Oct
Profile · tradition
pac-rp@2026.1 · smarta
Rule
mahalaya-amavasya@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s