Ruling · Mahālaya Amāvāsyā (Sarvapitṛ Amāvāsyā) · 2000

Wednesday 27 September

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 440 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 Wednesday 27 September

Taken. The only afternoon Amāvasyā reaches.

13:20 aparāhṇa beginsaparāhṇa ends 15:44
12:5613:2013:4414:0814:3214:5615:2015:4416:08

143 of 143 minutes covered

Afternoon of Thursday 28 September

Amāvasyā is absent from aparāhṇa. Not taken.

13:20 aparāhṇa beginsaparāhṇa ends 15:43
12:5613:2013:4414:0814:3214:5615:2015:4416:08

0 of 143 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 06:01 on Wed 27 Sep to 03:53 on Thu 28 Sep.

    2000-09-26T22:00:34Z → 2000-09-27T19:52:57Z

  2. 02

    Kāla

    Aparāhṇa is 10th to 12th of 15 day muhūrtas: 13:20–15:44 on the 27th, 13:20–15:43 on the 28th.

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

  3. 03

    Rule

    Amāvasyā must be present during aparāhṇa. It covers 143 of 143 minutes on the 27th and 0 of 143 on the 28th.

    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 26394 s

  5. 05

    Ruling

    Mahālaya Amāvāsyā, Baoding, 2000: Wednesday 27 September.

    confidence: determinate

Say it like this

In Baoding, Mahālaya Amāvāsyā 2000 falls on Wednesday 27 September. Amāvasyā runs from 06:01 on Wed 27 Sep to 03:53 on Thu 28 Sep and covers all of aparāhṇa that afternoon.

ahargana.org/baoding/festivals/2000/mahalaya-amavasya · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 27 Sep
Ahargaṇa, classicalDisc centre, no refractionWed 27 Sep
compat-drikpanchangComparison profileWed 27 Sep
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 26thCoveredAparāhṇa 27thCoveredRuled
Los Angeles15:01 → 12:5313:5679 min13:550 min26 Sep
Chicago17:01 → 14:5313:530 min13:5261 min27 Sep
Jersey City18:01 → 15:5313:590 min13:58115 min27 Sep
Port of Spain18:01 → 15:5313:100 min13:09145 min27 Sep
London23:01 → 20:5314:030 min14:02142 min27 Sep
Durban00:01 → 21:5313:010 min13:01147 min27 Sep
Dubai02:01 → 23:5313:220 min13:21144 min27 Sep
Delhi03:31 → 01:2313:240 min13:24144 min27 Sep
Kolkata03:31 → 01:2312:400 min12:39144 min27 Sep
Singapore06:01 → 03:5314:080 min14:08145 min27 Sep
Sydney09:01 → 06:5314:000 min14:00147 min27 Sep
Suva10:01 → 07:5313:110 min13:11146 min27 Sep
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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