Ruling · Mahālaya Amāvāsyā (Sarvapitṛ Amāvāsyā) · 2021

Wednesday 6 October

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 211 minutes.

Decide it for

38°52′ N 115°28′ E · Asia/Shanghai · GeoNames 1816971

The two afternoons

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

Afternoon of Tuesday 5 October

Amāvasyā is absent from aparāhṇa. Not taken.

13:16 aparāhṇa beginsaparāhṇa ends 15:35
12:5213:1613:4014:0414:2814:5215:1615:4016:04

0 of 139 minutes covered

Afternoon of Wednesday 6 October

Taken. The only afternoon Amāvasyā reaches.

13:15 aparāhṇa beginsaparāhṇa ends 15:34
12:5113:1513:3914:0314:2714:5115:1515:3916:03

139 of 139 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 21:35 on Tue 5 Oct to 19:05 on Wed 6 Oct.

    2021-10-05T13:34:40Z → 2021-10-06T11:05:24Z

  2. 02

    Kāla

    Aparāhṇa is 10th to 12th of 15 day muhūrtas: 13:16–15:35 on the 5th, 13:15–15:34 on the 6th.

    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 139 minutes on the 5th and 139 of 139 on the 6th.

    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 12666 s

  5. 05

    Ruling

    Mahālaya Amāvāsyā, Baoding, 2021: Wednesday 6 October.

    confidence: determinate

Say it like this

In Baoding, Mahālaya Amāvāsyā 2021 falls on Wednesday 6 October. Amāvasyā runs from 21:35 on Tue 5 Oct to 19:05 on Wed 6 Oct and covers all of aparāhṇa that afternoon.

ahargana.org/baoding/festivals/2021/mahalaya-amavasya · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 6 Oct
Ahargaṇa, classicalDisc centre, no refractionWed 6 Oct
compat-drikpanchangComparison profileWed 6 Oct
No institution has a recorded ruling for Baoding.

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 5thCoveredAparāhṇa 6thCoveredRuled
Los Angeles06:35 → 04:0513:51140 min13:500 min5 Oct
Chicago08:35 → 06:0513:48138 min13:470 min5 Oct
Jersey City09:35 → 07:0513:54139 min13:530 min5 Oct
Port of Spain09:35 → 07:0513:06144 min13:060 min5 Oct
London14:35 → 12:0513:5698 min13:560 min5 Oct
Durban15:35 → 13:0512:590 min12:596 min6 Oct
Dubai17:35 → 15:0513:180 min13:17108 min6 Oct
Delhi19:05 → 16:3513:200 min13:19141 min6 Oct
Kolkata19:05 → 16:3512:360 min12:35142 min6 Oct
Singapore21:35 → 19:0514:060 min14:05145 min6 Oct
Sydney00:35 → 22:0513:590 min13:59151 min6 Oct
Suva01:35 → 23:0513:090 min13:09148 min6 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

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